---
title: Identify the principal reason for which the three-toed sloth moves w… — The rainforest from the top: emergent… · tree and pragmatics
description: Identify the principal reason for which the three-toed sloth moves with such deliberation. Exam question 2 of lesson 2 «The rainforest from the top: emergent layer and canopy» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; 
---

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# Exam question 2 · The rainforest from the top: emergent layer and canopy

<!-- .ven lang=en -->
Identify the principal reason for which the three-toed sloth moves with such deliberation.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, toed sloth · **What happens:** identify, move · **To what, where:** principal reason

<!-- .vabout -->
This is exam question 2 of lesson 2 «The rainforest from the top: emergent layer and canopy» 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/2-the-rainforest-from-the-top/#e2).

## The question {#question}

```conllu
# sent_id = question:biology:2-the-rainforest-from-the-top:e2:1
# text = Identify the principal reason for which the three-toed sloth moves with such deliberation.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	12	obl	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
8	three	three	NUM	CD	NumForm=Word|NumType=Card	10	nummod	_	SpaceAfter=No
9	-	-	PUNCT	HYPH	_	8	punct	_	SpaceAfter=No
10	toed	toed	ADJ	JJ	_	11	amod	_	_
11	sloth	sloth	NOUN	NN	Number=Sing	12	nsubj	_	_
12	moves	move	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	acl	_	_
13	with	with	ADP	IN	_	15	case	_	_
14	such	such	ADJ	JJ	Degree=Pos	15	amod	_	_
15	deliberation	deliberation	NOUN	NN	Number=Sing	12	obl	_	SpaceAfter=No
16	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **move** | present | the toed sloth |  |  |  |  | for the principal reason; with such deliberation | vn roll-51.3.1 «NP.theme V»: agent=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.

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Its limbs are habitually injured by the prolonged suspension of the body from branches

```conllu
# sent_id = question:biology:2-the-rainforest-from-the-top:e2:o1:1
# text = Its limbs are habitually injured by the prolonged suspension of the body from branches
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	limbs	limb	NOUN	NNS	Number=Plur	5	nsubj:pass	_	_
3	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	aux:pass	_	_
4	habitually	habitually	ADV	RB	_	5	advmod	_	_
5	injured	injure	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
6	by	by	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	prolonged	prolong	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	9	amod	_	_
9	suspension	suspension	NOUN	NN	Number=Sing	5	obl	_	_
10	of	of	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	body	body	NOUN	NN	Number=Sing	9	nmod	_	_
13	from	from	ADP	IN	_	14	case	_	_
14	branches	branch	NOUN	NNS	Number=Plur	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **injure** | present · passive | the prolonged suspension of the body | Its limbs |  | branches |  | habitually *property* | tree rules |
| 2 | **prolong** | participle |  |  |  |  |  |  | vn sustain-55.6 «NP V NP PP.instrument»: agent=Agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
It is incapable of perceiving its surroundings

```conllu
# sent_id = question:biology:2-the-rainforest-from-the-top:e2:o2:1
# text = It is incapable of perceiving its surroundings
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	incapable	incapable	ADJ	JJ	Degree=Pos	0	root	_	_
4	of	of	SCONJ	IN	_	5	mark	_	_
5	perceiving	perceive	VERB	VBG	Tense=Pres|VerbForm=Part	3	advcl	_	_
6	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
7	surroundings	surroundings	NOUN	NNS	Number=Ptan	5	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | It |  |  |  |  | incapable *property* | tree rules |
| 2 | **perceive** | gerund |  | its surroundings |  |  |  |  | vn see-30.1-1 «NP V S»: agent=Experiencer surroundings=Stimulus |

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

<!-- .ven lang=en -->
Its diet of foliage yields little energy, and stillness furthermore assists its concealment

```conllu
# sent_id = question:biology:2-the-rainforest-from-the-top:e2:o3:1
# text = Its diet of foliage yields little energy, and stillness furthermore assists its concealment
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	diet	diet	NOUN	NN	Number=Sing	12	nsubj	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	foliage	foliage	NOUN	NN	Number=Sing	5	compound	_	_
5	yields	yield	NOUN	NNS	Number=Plur	2	nmod	_	_
6	little	little	ADJ	JJ	Degree=Pos	7	amod	_	_
7	energy	energy	NOUN	NN	Number=Sing	5	conj	_	SpaceAfter=No
8	,	,	PUNCT	,	_	12	punct	_	_
9	and	and	CCONJ	CC	_	12	cc	_	_
10	stillness	stillness	NOUN	NN	Number=Sing	12	nsubj	_	_
11	furthermore	furthermore	ADV	RB	_	12	advmod	_	_
12	assists	assist	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
13	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	14	nmod:poss	_	_
14	concealment	concealment	NOUN	NN	Number=Sing	12	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **assist** | present | Its diet of foliage yields and little energy | stillness's concealment |  |  |  | furthermore *property* | vn help-72.1-1-1 «NP V NP»: agent=Agent concealment=Beneficiary |
| 2 | **conceal** |  | stillness |  |  |  |  |  | nom concealment «state transitive»: poss=agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
It is perpetually asleep throughout daylight

```conllu
# sent_id = question:biology:2-the-rainforest-from-the-top:e2:o4:1
# text = It is perpetually asleep throughout daylight
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	perpetually	perpetually	ADV	RB	_	4	advmod	_	_
4	asleep	asleep	ADJ	JJ	Degree=Pos	0	root	_	_
5	throughout	throughout	ADP	IN	_	6	case	_	_
6	daylight	daylight	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | It |  |  |  | throughout daylight | asleep, perpetually *property* | tree rules |

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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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