---
title: Why would light be so useful in the deep sea? — The aquarium: jellyfish, octopuses, se… · tree and pragmatics
description: Why would light be so useful in the deep sea? Test 11 · ★ of lesson 92 «The aquarium: jellyfish, octopuses, sea stars and the deep sea» 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 · ★ · The aquarium: jellyfish, octopuses, sea stars and the deep…

<!-- .ven lang=en -->
Why would light be so useful in the deep sea?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** light · **What happens:** be · **To what, where:** deep sea

<!-- .vabout -->
This is test 11 · ★ of lesson 92 «The aquarium: jellyfish, octopuses, sea stars and the deep sea» 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/92-the-aquarium-jellyfish-octopuses-sea-stars-and-the-deep-sea/#t11).

## The question {#question}

```conllu
# sent_id = question:biology:92-the-aquarium-jellyfish-octopuses-sea-stars-and-the-deep-sea:t11:1
# text = Why would light be so useful in the deep sea?
1	Why	why	ADV	WRB	PronType=Int	6	advmod	_	_
2	would	would	AUX	MD	VerbForm=Fin	6	aux	_	_
3	light	light	NOUN	NN	Number=Sing	6	nsubj	_	_
4	be	be	AUX	VB	VerbForm=Inf	6	cop	_	_
5	so	so	ADV	RB	_	6	advmod	_	_
6	useful	useful	ADJ	JJ	Degree=Pos	0	root	_	_
7	in	in	ADP	IN	_	10	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
9	deep	deep	ADJ	JJ	Degree=Pos	10	amod	_	_
10	sea	sea	NOUN	NN	Number=Sing	6	obl	_	SpaceAfter=No
11	?	?	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | would | light |  |  | the deep sea |  | useful *property* | tree rules |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
No sunlight reaches there, so it is the only way to be seen

```conllu
# sent_id = question:biology:92-the-aquarium-jellyfish-octopuses-sea-stars-and-the-deep-sea:t11:o1:1
# text = No sunlight reaches there, so it is the only way to be seen
1	No	no	DET	DT	PronType=Neg	2	det	_	_
2	sunlight	sunlight	NOUN	NN	Number=Sing	3	nsubj	_	_
3	reaches	reach	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	there	there	ADV	RB	PronType=Dem	3	advmod	_	SpaceAfter=No
5	,	,	PUNCT	,	_	11	punct	_	_
6	so	so	ADV	RB	_	11	advmod	_	_
7	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	nsubj	_	_
8	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	cop	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	only	only	ADJ	JJ	Degree=Pos	11	amod	_	_
11	way	way	NOUN	NN	Number=Sing	3	obl	_	_
12	to	to	PART	TO	_	14	mark	_	_
13	be	be	AUX	VB	VerbForm=Inf	14	aux:pass	_	_
14	seen	see	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	11	acl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **reach** | present | no sunlight |  |  | there |  |  | vn body\_motion-49.2-1-1 «NP V»: agent=Agent |
| 2 | **is a** | present | sunlight | the only way |  |  |  |  | tree rules |
| 3 | **see** | to-infinitive · passive | no sunlight *not said here* |  |  |  |  |  | vn comprehend-87.2-1-1 «NP V» |

### Option 2 {#o2}

<!-- .ven lang=en -->
It frightens away the sunlight

```conllu
# sent_id = question:biology:92-the-aquarium-jellyfish-octopuses-sea-stars-and-the-deep-sea:t11:o2:1
# text = It frightens away the sunlight
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	frightens	frighten	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	away	away	ADV	RB	_	2	advmod	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	sunlight	sunlight	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **frighten away** | present | It | the sunlight |  |  |  | away *property* | vn amuse-31.1 «NP V NP»: agent=Stimulus sunlight=Experiencer |

### Option 3 {#o3}

<!-- .ven lang=en -->
It warms the freezing water

```conllu
# sent_id = question:biology:92-the-aquarium-jellyfish-octopuses-sea-stars-and-the-deep-sea:t11:o3:1
# text = It warms the freezing water
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	warms	warm	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	freezing	freezing	NOUN	NN	Number=Sing	5	compound	_	_
5	water	water	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **warm** | present | It | the freezing water |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent water=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
It makes green plants grow all over the dark sea floor

```conllu
# sent_id = question:biology:92-the-aquarium-jellyfish-octopuses-sea-stars-and-the-deep-sea:t11:o4:1
# text = It makes green plants grow all over the dark sea floor
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	green	green	ADJ	JJ	Degree=Pos	4	amod	_	_
4	plants	plant	NOUN	NNS	Number=Plur	5	nsubj	_	_
5	grow	grow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	2	xcomp	_	_
6	all	all	ADV	RB	_	11	advmod	_	_
7	over	over	ADP	IN	_	11	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
9	dark	dark	ADJ	JJ	Degree=Pos	11	amod	_	_
10	sea	sea	NOUN	NN	Number=Sing	11	compound	_	_
11	floor	floor	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | It |  |  | the dark sea floor |  |  | tree rules |
| 2 | **grow** | present | green plants |  |  |  |  |  | vn appear-48.1.1 «NP V»: agent=Theme |

<!-- 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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