---
title: Ascertain the reason for which the snowy owl hunts during the hours… — The Arctic tundra: musk oxen, arctic f… · tree and pragmatics
description: Ascertain the reason for which the snowy owl hunts during the hours of daylight. Exam question 4 of lesson 168 «The Arctic tundra: musk oxen, arctic foxes, snowy owls and the truth about lemmings» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question
---

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# Exam question 4 · The Arctic tundra: musk oxen, arctic foxes, snowy owls and…

<!-- .ven lang=en -->
Ascertain the reason for which the snowy owl hunts during the hours of daylight.

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** you, snowy owl · **What happens:** ascertain, hunt · **To what, where:** reason

<!-- .vabout -->
This is exam question 4 of lesson 168 «The Arctic tundra: musk oxen, arctic foxes, snowy owls and the truth about lemmings» 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/168-the-arctic-tundra-musk-oxen-arctic-foxes-and-the-truth-about-lemmings/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:168-the-arctic-tundra-musk-oxen-arctic-foxes-and-the-truth-about-lemmings:e4:1
# text = Ascertain the reason for which the snowy owl hunts during the hours of daylight.
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	9	obl	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	snowy	snowy	ADJ	JJ	Degree=Pos	8	amod	_	_
8	owl	owl	NOUN	NN	Number=Sing	9	nsubj	_	_
9	hunts	hunt	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	acl	_	_
10	during	during	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	hours	hour	NOUN	NNS	Number=Plur	9	obl	_	_
13	of	of	ADP	IN	_	14	case	_	_
14	daylight	daylight	NOUN	NN	Number=Sing	12	nmod	_	SpaceAfter=No
15	.	.	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 | **hunt** | present | the snowy owl |  |  |  | hour | for the reason | vn hunt-35.1 «NP V PP.theme PP.location»: agent=Agent for which=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 {#o1}

<!-- .ven lang=en -->
It is fearful of darkness

```conllu
# sent_id = question:biology:168-the-arctic-tundra-musk-oxen-arctic-foxes-and-the-truth-about-lemmings:e4:o1:1
# text = It is fearful of darkness
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	fearful	fearful	ADJ	JJ	Degree=Pos	0	root	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	darkness	darkness	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | It |  |  |  |  | of darkness; fearful *property* | tree rules |

### Option 2 {#o2}

<!-- .ven lang=en -->
Its eyes are incapable of vision at night

```conllu
# sent_id = question:biology:168-the-arctic-tundra-musk-oxen-arctic-foxes-and-the-truth-about-lemmings:e4:o2:1
# text = Its eyes are incapable of vision at night
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	eyes	eye	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	incapable	incapable	ADJ	JJ	Degree=Pos	0	root	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	vision	vision	NOUN	NN	Number=Sing	4	obl	_	_
7	at	at	ADP	IN	_	8	case	_	_
8	night	night	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Its eyes |  |  |  | night | of vision; incapable *property* | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
Its prey is active exclusively in daylight during the summer months

```conllu
# sent_id = question:biology:168-the-arctic-tundra-musk-oxen-arctic-foxes-and-the-truth-about-lemmings:e4:o3:1
# text = Its prey is active exclusively in daylight during the summer months
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	prey	prey	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
4	active	active	ADJ	JJ	Degree=Pos	0	root	_	_
5	exclusively	exclusively	ADV	RB	_	4	advmod	_	_
6	in	in	ADP	IN	_	7	case	_	_
7	daylight	daylight	NOUN	NN	Number=Sing	4	obl	_	_
8	during	during	ADP	IN	_	11	case	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	summer	summer	NOUN	NN	Number=Sing	11	compound	_	_
11	months	month	NOUN	NNS	Number=Plur	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | Its prey |  |  | daylight | month | active, exclusively *property* | tree rules |

### Option 4 · ← Mova's choice · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The sun does not set during the Arctic summer

```conllu
# sent_id = question:biology:168-the-arctic-tundra-musk-oxen-arctic-foxes-and-the-truth-about-lemmings:e4:o4:1
# text = The sun does not set during the Arctic summer
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	sun	sun	NOUN	NN	Number=Sing	5	nsubj	_	_
3	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux	_	_
4	not	not	PART	RB	Polarity=Neg	5	advmod	_	_
5	set	set	VERB	VB	VerbForm=Inf	0	root	_	_
6	during	during	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	Arctic	arctic	ADJ	JJ	Degree=Pos	9	amod	_	_
9	summer	summer	NOUN	NN	Number=Sing	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **set** | present · do-support | the sun |  |  |  | summer |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |

<!-- div src -->

**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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