---
title: Ascertain the reason for which a hummingbird's nest is able to accom… — More builders: caddis cases, paper was… · tree and pragmatics
description: Ascertain the reason for which a hummingbird's nest is able to accommodate the growth of the chicks. Exam question 4 of lesson 245 «More builders: caddis cases, paper wasps, moles, apes' beds and sand circles» of the biology course of Mova's primary school, with the dependency tree and pragmatics of
---

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# Exam question 4 · More builders: caddis cases, paper wasps, moles, apes' bed…

<!-- .ven lang=en -->
Ascertain the reason for which a hummingbird's nest is able to accommodate the growth of the chicks.

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 4 · wrong ✗ · **Who acts:** you, nest, chicks · **What happens:** ascertain, be, accommodate, grow · **To what, where:** reason, growth

<!-- .vabout -->
This is exam question 4 of lesson 245 «More builders: caddis cases, paper wasps, moles, apes' beds and sand circles» of the biology course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/biology/245-more-builders-caddis-cases-paper-wasps-moles-apes-beds-and-sand-circles/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:245-more-builders-caddis-cases-paper-wasps-moles-apes-beds-and-sand-circles:e4:1
# text = Ascertain the reason for which a hummingbird's nest is able to accommodate the growth of the chicks.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	11	obl	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	hummingbird	hummingbird	NOUN	NN	Number=Sing	9	nmod:poss	_	SpaceAfter=No
8	's	's	PART	POS	_	7	case	_	_
9	nest	nest	NOUN	NN	Number=Sing	11	nsubj	_	_
10	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
11	able	able	ADJ	JJ	Degree=Pos	3	acl	_	_
12	to	to	PART	TO	_	13	mark	_	_
13	accommodate	accommodate	VERB	VB	VerbForm=Inf	11	xcomp	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	growth	growth	NOUN	NN	Number=Sing	13	obj	_	_
16	of	of	ADP	IN	_	18	case	_	_
17	the	the	DET	DT	Definite=Def|PronType=Art	18	det	_	_
18	chicks	chick	NOUN	NNS	Number=Plur	15	nmod	_	SpaceAfter=No
19	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the reason |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent reason=Topic |
| 2 | **is** | present | a hummingbird's nest |  |  |  |  | for the reason; able *property* | tree rules |
| 3 | **accommodate** | to-infinitive | a hummingbird's nest *not said here* | the growth of the chicks |  |  |  |  | vn adjust-26.9 «NP V NP»: agent=Agent growth=Patient |
| 4 | **grow** |  | the chicks |  |  |  |  |  | nom growth «process intransitive»: of=agent |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
The parents enlarge it each morning with additional stones from the river bank

```conllu
# sent_id = question:biology:245-more-builders-caddis-cases-paper-wasps-moles-apes-beds-and-sand-circles:e4:o1:1
# text = The parents enlarge it each morning with additional stones from the river bank
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	parents	parent	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	enlarge	enlarge	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	obj	_	_
5	each	each	DET	DT	PronType=Tot	6	det	_	_
6	morning	morning	NOUN	NN	Number=Sing	3	obl:unmarked	_	_
7	with	with	ADP	IN	_	9	case	_	_
8	additional	additional	ADJ	JJ	Degree=Pos	9	amod	_	_
9	stones	stone	NOUN	NNS	Number=Plur	3	obl	_	_
10	from	from	ADP	IN	_	13	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
12	river	river	NOUN	NN	Number=Sing	13	compound	_	_
13	bank	bank	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **enlarge** | present | the parents | it |  | the river bank | morning | with additional stones | vn other\_cos-45.4 «NP V NP PP.instrument»: agent=Agent it=Patient with stone=Instrument |

### Option 2 {#o2}

<!-- .ven lang=en -->
The chicks vacate it within hours of hatching

```conllu
# sent_id = question:biology:245-more-builders-caddis-cases-paper-wasps-moles-apes-beds-and-sand-circles:e4:o2:1
# text = The chicks vacate it within hours of hatching
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	chicks	chick	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	vacate	vacate	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	obj	_	_
5	within	within	ADP	IN	_	6	case	_	_
6	hours	hour	NOUN	NNS	Number=Plur	3	obl	_	_
7	of	of	ADP	IN	_	8	case	_	_
8	hatching	hatching	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **vacate** | present | the chicks | it |  |  | hour |  | vn escape-51.1-1-1 «NP V NP»: agent=Theme it=Initial\_Location |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
It is constructed of rigid mud which is rebuilt daily

```conllu
# sent_id = question:biology:245-more-builders-caddis-cases-paper-wasps-moles-apes-beds-and-sand-circles:e4:o3:1
# text = It is constructed of rigid mud which is rebuilt daily
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	constructed	construct	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	rigid	rigid	ADJ	JJ	Degree=Pos	6	amod	_	_
6	mud	mud	NOUN	NN	Number=Sing	3	obl	_	_
7	which	which	PRON	WDT	PronType=Rel	9	nsubj:pass	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	aux:pass	_	_
9	rebuilt	rebuild	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	6	acl:relcl	_	_
10	daily	daily	ADV	RB	_	9	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **construct** | present · passive |  | It |  |  |  | of rigid mud | vn create-26.4 «NP V NP»: subject=Result |
| 2 | **rebuild** | present · passive |  | rigid mud |  |  |  | daily *property* | vn create-26.4 «NP V NP»: subject=Result |

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
It is bound with spider silk, which stretches as the chicks increase in size

<!-- fold The tree, 14 words -->
```conllu
# sent_id = question:biology:245-more-builders-caddis-cases-paper-wasps-moles-apes-beds-and-sand-circles:e4:o4:1
# text = It is bound with spider silk, which stretches as the chicks increase in size
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	bound	bind	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	with	with	ADP	IN	_	6	case	_	_
5	spider	spider	NOUN	NN	Number=Sing	6	compound	_	_
6	silk	silk	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
7	,	,	PUNCT	,	_	9	punct	_	_
8	which	which	PRON	WDT	PronType=Rel	9	nsubj	_	_
9	stretches	stretch	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	acl:relcl	_	_
10	as	as	SCONJ	IN	_	13	mark	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	chicks	chick	NOUN	NNS	Number=Plur	13	nsubj	_	_
13	increase	increase	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	ccomp	_	_
14	in	in	ADP	IN	_	15	case	_	_
15	size	size	NOUN	NN	Number=Sing	13	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **bind** | present · passive |  | It |  |  |  | with spider silk | vn shake-22.3-2-1 «NP V NP PP»: subject=Patient with silk=Co-Patient |
| 2 | **stretch** | present | spider silk |  |  |  |  |  | tree rules |
| 3 | **increase** | present | the chicks |  |  | size |  |  | vn caused\_calibratable\_cos-45.6.2-1 «NP V ADV-Middle»: agent=Patient |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

<!-- /div -->

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