---
title: A pair of birds take turns sitting on their eggs and fetching food.… — The aviary: the walk-through tropical… · tree and pragmatics
description: A pair of birds take turns sitting on their eggs and fetching food. Why does this help? Test 10 of lesson 93 «The aviary: the walk-through tropical house» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was wro
---

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# Test 10 · The aviary: the walk-through tropical house

<!-- .ven lang=en -->
A pair of birds take turns sitting on their eggs and fetching food. Why does this help?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 3 · wrong ✗ · **Who acts:** pair, turns, this · **What happens:** take, sit, fetch, help · **To what, where:** turns, eggs, food

<!-- .vabout -->
This is test 10 of lesson 93 «The aviary: the walk-through tropical house» of the biology course of Mova's primary school. 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/93-the-aviary-the-walk-through-tropical-house/#t10).

## The question {#question}

<!-- .note -->
*Sentence 1:* A pair of birds take turns sitting on their eggs and fetching food.

```conllu
# sent_id = question:biology:93-the-aviary-the-walk-through-tropical-house:t10:1
# text = A pair of birds take turns sitting on their eggs and fetching food.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	pair	pair	NOUN	NN	Number=Sing	5	nsubj	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	birds	bird	NOUN	NNS	Number=Plur	2	nmod	_	_
5	take	take	VERB	VBP	Mood=Ind|Number=Plur|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
6	turns	turn	NOUN	NNS	Number=Plur	5	obj	_	_
7	sitting	sit	VERB	VBG	VerbForm=Ger	6	acl	_	_
8	on	on	ADP	IN	_	10	case	_	_
9	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	10	nmod:poss	_	_
10	eggs	egg	NOUN	NNS	Number=Plur	7	obl	_	_
11	and	and	CCONJ	CC	_	12	cc	_	_
12	fetching	fetch	VERB	VBG	VerbForm=Ger	7	conj	_	_
13	food	food	NOUN	NN	Number=Sing	12	obj	_	SpaceAfter=No
14	.	.	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **take** | present | a pair of birds | turns |  |  |  |  | vn bring-11.3 «NP V NP»: agent=Agent turn=Theme |
| 2 | **sit** | gerund | turns *not said here* |  |  | turns's eggs |  |  | vn assuming\_position-50 «NP V PP.location»: agent=Agent on egg=Location |
| 3 | **fetch** | gerund | turns *not said here* | food |  |  |  |  | vn get-13.5.1-1 «NP V NP»: agent=Agent food=Theme |

<!-- .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.

<!-- .note -->
*Sentence 2:* Why does this help?

```conllu
# sent_id = question:biology:93-the-aviary-the-walk-through-tropical-house:t10:2
# text = Why does this help?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	this	this	PRON	DT	Number=Sing|PronType=Dem	4	nsubj	_	_
4	help	help	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
5	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | present · do-support | this |  |  |  |  |  | vn help-72.1-1-1 «NP V PP.theme»: agent=Agent |

## The options {#options}

### Option 1 {#o1}

<!-- .ven lang=en -->
The parents get bored sitting

```conllu
# sent_id = question:biology:93-the-aviary-the-walk-through-tropical-house:t10:o1:1
# text = The parents get bored sitting
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	parents	parent	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	get	get	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	bored	bored	ADJ	JJ	Degree=Pos	5	amod	_	_
5	sitting	sitting	NOUN	NN	Number=Sing	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **get** | present | the parents | bored sitting |  |  |  |  | vn comprehend-87.2-1 «NP V NP»: agent=Experiencer sitting=Stimulus |

### Option 2 · ← Mova's choice {#o2}

<!-- .ven lang=en -->
It stops the eggs hatching too early

```conllu
# sent_id = question:biology:93-the-aviary-the-walk-through-tropical-house:t10:o2:1
# text = It stops the eggs hatching too early
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	stops	stop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	eggs	egg	NOUN	NNS	Number=Plur	2	obj	_	_
5	hatching	hatch	VERB	VBG	VerbForm=Ger	4	acl	_	_
6	too	too	ADV	RB	_	7	advmod	_	_
7	early	early	ADV	RB	Degree=Pos	2	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stop** | present | It | the eggs |  |  |  | early *property* | vn stop-55.4-1-1 «NP V NP.eventuality»: agent=Subeventuality egg=Eventuality |
| 2 | **hatch** | gerund | the eggs *not said here* |  |  |  |  |  | vn grow-26.2.1 «NP.patient V PP.product»: agent=Patient |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
The chicks survive better with two parents

```conllu
# sent_id = question:biology:93-the-aviary-the-walk-through-tropical-house:t10:o3:1
# text = The chicks survive better with two parents
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	chicks	chick	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	survive	survive	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	better	well	ADV	RBR	Degree=Cmp	3	advmod	_	_
5	with	with	ADP	IN	_	7	case	_	_
6	two	two	NUM	CD	NumForm=Word|NumType=Card	7	nummod	_	_
7	parents	parent	NOUN	NNS	Number=Plur	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **survive** | present | the chicks |  |  |  |  | with two parents; well *property* | vn exist-47.1-1 «NP V»: agent=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
The eggs must be moved to a new nest every single hour

```conllu
# sent_id = question:biology:93-the-aviary-the-walk-through-tropical-house:t10:o4:1
# text = The eggs must be moved to a new nest every single hour
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	eggs	egg	NOUN	NNS	Number=Plur	5	nsubj:pass	_	_
3	must	must	AUX	MD	VerbForm=Fin	5	aux	_	_
4	be	be	AUX	VB	VerbForm=Inf	5	aux:pass	_	_
5	moved	move	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
6	to	to	ADP	IN	_	9	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	new	new	ADJ	JJ	Degree=Pos	9	amod	_	_
9	nest	nest	NOUN	NN	Number=Sing	5	obl	_	_
10	every	every	DET	DT	PronType=Tot	12	det	_	_
11	single	single	ADJ	JJ	Degree=Pos	12	amod	_	_
12	hour	hour	NOUN	NN	Number=Sing	5	obl:unmarked	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | must · passive |  | the eggs |  | a new nest | hour |  | vn roll-51.3.1 «NP V NP PP.trajectory»: subject=Theme to nest=Trajectory |

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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.

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