---
title: Why do seals need a thick layer of blubber? — Dolphins, porpoises and seals · tree and pragmatics
description: Why do seals need a thick layer of blubber? Test 11 · ★ of lesson 27 «Dolphins, porpoises and seals» 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 right.
---

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# Test 11 · ★ · Dolphins, porpoises and seals

<!-- .ven lang=en -->
Why do seals need a thick layer of blubber?

<!-- .vintro -->
**Mova's choice:** option 4 · **The right answer:** option 4 · right ✓ · **Who acts:** seals · **What happens:** need · **To what, where:** thick layer

<!-- .vabout -->
This is test 11 · ★ of lesson 27 «Dolphins, porpoises and seals» 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/27-dolphins-porpoises-and-seals/#t11).

## The question {#question}

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t11:1
# text = Why do seals need a thick layer of blubber?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	_
3	seals	seal	NOUN	NNS	Number=Plur	4	nsubj	_	_
4	need	need	VERB	VB	VerbForm=Inf	0	root	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	thick	thick	ADJ	JJ	Degree=Pos	7	amod	_	_
7	layer	layer	NOUN	NN	Number=Sing	4	obj	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	blubber	blubber	NOUN	NN	Number=Sing	7	nmod	_	SpaceAfter=No
10	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present · do-support | seals | a thick layer of blubber |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot layer=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 makes them heavy enough to sink

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t11:o1:1
# text = It makes them heavy enough to sink
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	makes	make	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	2	obj	_	_
4	heavy	heavy	ADJ	JJ	Degree=Pos	2	xcomp	_	_
5	enough	enough	ADV	RB	_	4	advmod	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	sink	sink	VERB	VB	VerbForm=Inf	4	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | It | them *= they* |  |  |  | heavy *property* | vn build-26.1-1 «NP.material V NP»: agent=Material they=Product |
| 2 | **sink** | to-infinitive |  |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It helps them walk about on land

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t11:o2:1
# text = It helps them walk about on land
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	helps	help	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	2	obj	_	_
4	walk	walk	VERB	VB	VerbForm=Inf	2	xcomp	_	_
5	about	about	ADV	RB	_	4	advmod	_	_
6	on	on	ADP	IN	_	7	case	_	_
7	land	land	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | present | It | them *= they* |  |  |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent they=Beneficiary clause=Theme |
| 2 | **walk** | infinitive | them *= they* *not said here* |  |  | land |  | about *property* | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme on land=Trajectory |

### Option 3 {#o3}

<!-- .ven lang=en -->
It stores spare whiskers for later

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t11:o3:1
# text = It stores spare whiskers for later
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	stores	store	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	spare	spare	ADJ	JJ	Degree=Pos	4	amod	_	_
4	whiskers	whisker	NOUN	NNS	Number=Plur	2	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	later	late	ADV	RBR	Degree=Cmp	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **store** | present | It | spare whiskers |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent whisker=Theme |

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

<!-- .ven lang=en -->
It keeps them warm in icy water

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t11:o4:1
# text = It keeps them warm in icy water
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	2	obj	_	_
4	warm	warm	ADJ	JJ	Degree=Pos	2	xcomp	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	icy	icy	ADJ	JJ	Degree=Pos	7	amod	_	_
7	water	water	NOUN	NN	Number=Sing	2	obl	_	_
```

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

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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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- ← previous: [Dolphins, porpoises and seals, test 10](https://md.mova.elamur.ai/free/en/corpora/questions/biology/27-dolphins-porpoises-and-seals/t10/)
- next →: [Dolphins, porpoises and seals, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/27-dolphins-porpoises-and-seals/e1/)
- ↑ back to [Dolphins, porpoises and seals](https://md.mova.elamur.ai/free/en/corpora/questions/biology/27-dolphins-porpoises-and-seals/)

