---
title: Why do night animals so often have big eyes? — The nocturnal house: night animals by… · tree and pragmatics
description: Why do night animals so often have big eyes? Test 10 · ★★ of lesson 95 «The nocturnal house: night animals by red light» 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 wrong.
---

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# Test 10 · ★★ · The nocturnal house: night animals by red light

<!-- .ven lang=en -->
Why do night animals so often have big eyes?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 4 · wrong ✗ · **What happens:** do, have · **To what, where:** night animals, big eyes

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This is test 10 · ★★ of lesson 95 «The nocturnal house: night animals by red light» 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/95-the-nocturnal-house-night-animals-by-red-light/#t10).

## The question {#question}

```conllu
# sent_id = question:biology:95-the-nocturnal-house-night-animals-by-red-light:t10:1
# text = Why do night animals so often have big eyes?
1	Why	why	ADV	WRB	PronType=Int	2	advmod	_	_
2	do	do	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	7	advcl	_	_
3	night	night	NOUN	NN	Number=Sing	4	compound	_	_
4	animals	animal	NOUN	NNS	Number=Plur	2	obj	_	_
5	so	so	ADV	RB	_	7	advmod	_	_
6	often	often	ADV	RB	_	7	advmod	_	_
7	have	have	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
8	big	big	ADJ	JJ	Degree=Pos	9	amod	_	_
9	eyes	eye	NOUN	NNS	Number=Plur	7	obj	_	SpaceAfter=No
10	?	?	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **do** | present |  | night animals |  |  |  |  | vn act-114-1 «NP V NP»: agent=Agent animal=Eventuality |
| 2 | **have** | present |  | big eyes |  |  |  | often *property* | vn birth-28.2-1 «NP V NP»: agent=Agent eye=Patient |

<!-- .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 -->
Big eyes help them smell food much better in the dark

```conllu
# sent_id = question:biology:95-the-nocturnal-house-night-animals-by-red-light:t10:o1:1
# text = Big eyes help them smell food much better in the dark
1	Big	big	ADJ	JJ	Degree=Pos	2	amod	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	help	help	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	3	obj	_	_
5	smell	smell	VERB	VB	VerbForm=Inf	3	xcomp	_	_
6	food	food	NOUN	NN	Number=Sing	5	obj	_	_
7	much	much	ADV	RB	_	8	advmod	_	_
8	better	good	ADJ	JJR	Degree=Cmp	3	advmod	_	_
9	in	in	ADP	IN	_	11	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	dark	dark	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | present | Big eyes | them *= they* |  | the dark |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent they=Beneficiary clause=Theme |
| 2 | **smell** | infinitive | them *= they* *not said here* | food |  |  |  |  | vn see-30.1 «NP V NP»: agent=Experiencer food=Stimulus |

### Option 2 {#o2}

<!-- .ven lang=en -->
Big eyes keep them warm

```conllu
# sent_id = question:biology:95-the-nocturnal-house-night-animals-by-red-light:t10:o2:1
# text = Big eyes keep them warm
1	Big	big	ADJ	JJ	Degree=Pos	2	amod	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	keep	keep	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	3	obj	_	_
5	warm	warm	ADJ	JJ	Degree=Pos	3	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | Big eyes | them *= they* |  |  |  | warm *property* | vn keep-15.2 «NP V NP»: agent=Agent they=Theme |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
Big eyes make them look scary

```conllu
# sent_id = question:biology:95-the-nocturnal-house-night-animals-by-red-light:t10:o3:1
# text = Big eyes make them look scary
1	Big	big	ADJ	JJ	Degree=Pos	2	amod	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	3	obj	_	_
5	look	look	VERB	VB	VerbForm=Inf	3	xcomp	_	_
6	scary	scary	ADJ	JJ	Degree=Pos	5	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Big eyes | them *= they* |  |  |  |  | tree rules |
| 2 | **look** | infinitive | them *= they* *not said here* |  |  |  |  | scary *property* | vn stimulus\_subject-30.4 «NP V ADJ»: agent=Stimulus |

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

<!-- .ven lang=en -->
Big eyes let in as much dim light as possible

```conllu
# sent_id = question:biology:95-the-nocturnal-house-night-animals-by-red-light:t10:o4:1
# text = Big eyes let in as much dim light as possible
1	Big	big	ADJ	JJ	Degree=Pos	2	amod	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	let	let	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	RP	_	3	compound:prt	_	_
5	as	as	ADV	RB	_	6	advmod	_	_
6	much	much	ADJ	JJ	Degree=Pos	8	amod	_	_
7	dim	dim	ADJ	JJ	Degree=Pos	8	amod	_	_
8	light	light	NOUN	NN	Number=Sing	3	obj	_	_
9	as	as	SCONJ	IN	_	10	mark	_	_
10	possible	possible	ADJ	JJ	Degree=Pos	3	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **let in** | present | Big eyes | much dim light |  |  |  |  | vn give-13.1-1 «NP V NP»: agent=Agent light=Theme |

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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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