---
title: Why would sound be more useful than eyes for a dolphin hunting in a… — Dolphins, porpoises and seals · tree and pragmatics
description: Why would sound be more useful than eyes for a dolphin hunting in a muddy river? Test 10 · ★ 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 wrong.
---

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# Test 10 · ★ · Dolphins, porpoises and seals

<!-- .ven lang=en -->
Why would sound be more useful than eyes for a dolphin hunting in a muddy river?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **Who acts:** you · **What happens:** sound, be

<!-- .vabout -->
This is test 10 · ★ 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/#t10).

## The question {#question}

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t10:1
# text = Why would sound be more useful than eyes for a dolphin hunting in a muddy river?
1	Why	why	ADV	WRB	PronType=Int	3	advmod	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	sound	sound	VERB	VB	VerbForm=Inf	6	advcl	_	_
4	be	be	AUX	VB	VerbForm=Inf	6	cop	_	_
5	more	more	ADV	RBR	Degree=Cmp	6	advmod	_	_
6	useful	useful	ADJ	JJ	Degree=Pos	0	root	_	_
7	than	than	ADP	IN	_	8	case	_	_
8	eyes	eye	NOUN	NNS	Number=Plur	6	obl	_	_
9	for	for	ADP	IN	_	12	case	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
11	dolphin	dolphin	NOUN	NN	Number=Sing	12	compound	_	_
12	hunting	hunting	NOUN	NN	Number=Sing	6	obl	_	_
13	in	in	ADP	IN	_	16	case	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
15	muddy	muddy	ADJ	JJ	Degree=Pos	16	amod	_	_
16	river	river	NOUN	NN	Number=Sing	12	nmod	_	SpaceAfter=No
17	?	?	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **sound** | would | you *not said here* |  |  |  |  |  | vn stimulus\_subject-30.4 «NP V PP.attribute»: agent=Stimulus |
| 2 | **is** | imperative | you *not said here* |  |  |  |  | than eyes; for a dolphin hunting in a muddy river; 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 {#o1}

<!-- .ven lang=en -->
Eyes don't work in salt water, so dolphins never use them at all

<!-- fold The tree, 14 words -->
```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t10:o1:1
# text = Eyes don't work in salt water, so dolphins never use them at all
1	Eyes	eye	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	aux	_	SpaceAfter=No
3	n't	not	PART	RB	Polarity=Neg	4	advmod	_	_
4	work	work	VERB	VB	VerbForm=Inf	0	root	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	salt	salt	NOUN	NN	Number=Sing	7	compound	_	_
7	water	water	NOUN	NN	Number=Sing	4	obl	_	SpaceAfter=No
8	,	,	PUNCT	,	_	12	punct	_	_
9	so	so	ADV	RB	_	12	advmod	_	_
10	dolphins	dolphin	NOUN	NNS	Number=Plur	12	nsubj	_	_
11	never	never	ADV	RB	PronType=Neg	12	advmod	_	_
12	use	use	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	conj	_	_
13	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	12	obj	_	_
14	at	at	ADP	IN	_	15	case	_	_
15	all	all	DET	DT	PronType=Tot	12	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **work** | present · do-support | Eyes |  |  |  |  | in salt water | vn employment-95.3 «NP V PP.theme»: agent=Agent in water=Theme |
| 2 | **not** **use** | present | dolphins | Eyes *= eye* |  | all |  |  | vn eat-39.1 «NP V NP»: agent=Agent they=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
Fish can't hear clicks

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t10:o2:1
# text = Fish can't hear clicks
1	Fish	fish	NOUN	NNS	Number=Plur	4	nsubj	_	_
2	ca	can	AUX	MD	VerbForm=Fin	4	aux	_	SpaceAfter=No
3	n't	not	PART	RB	Polarity=Neg	4	advmod	_	_
4	hear	hear	VERB	VB	VerbForm=Inf	0	root	_	_
5	clicks	click	NOUN	NNS	Number=Plur	4	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **hear** | can | Fish | clicks |  |  |  |  | vn see-30.1-1-1 «NP V S»: agent=Experiencer click=Stimulus |

### Option 3 {#o3}

<!-- .ven lang=en -->
Dolphins are blind

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t10:o3:1
# text = Dolphins are blind
1	Dolphins	dolphin	NOUN	NNS	Number=Plur	3	nsubj	_	_
2	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	cop	_	_
3	blind	blind	ADJ	JJ	Degree=Pos	0	root	_	_
```

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

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

<!-- .ven lang=en -->
Sound travels well in water but you can't see far in mud

```conllu
# sent_id = question:biology:27-dolphins-porpoises-and-seals:t10:o4:1
# text = Sound travels well in water but you can't see far in mud
1	Sound	sound	NOUN	NN	Number=Sing	2	nsubj	_	_
2	travels	travel	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	well	well	ADV	RB	Degree=Pos	2	advmod	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	water	water	NOUN	NN	Number=Sing	2	obl	_	_
6	but	but	CCONJ	CC	_	10	cc	_	_
7	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	10	nsubj	_	_
8	ca	can	AUX	MD	VerbForm=Fin	10	aux	_	SpaceAfter=No
9	n't	not	PART	RB	Polarity=Neg	10	advmod	_	_
10	see	see	VERB	VB	VerbForm=Inf	2	conj	_	_
11	far	far	ADV	RB	Degree=Pos	10	advmod	_	_
12	in	in	ADP	IN	_	13	case	_	_
13	mud	mud	NOUN	NN	Number=Sing	10	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **travel** | present | Sound |  |  | water |  | well *property* | vn run-51.3.2-1 «NP V PP.location»: agent=Theme in water=Trajectory |
| 2 | **not** **see** | can | you |  |  | mud |  | far *property* | vn comprehend-87.2-1-1 «NP V»: agent=Experiencer |

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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.

<!-- /div -->

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- ← previous: [Dolphins, porpoises and seals, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/biology/27-dolphins-porpoises-and-seals/t9/)
- next →: [Dolphins, porpoises and seals, test 11](https://md.mova.elamur.ai/free/en/corpora/questions/biology/27-dolphins-porpoises-and-seals/t11/)
- ↑ back to [Dolphins, porpoises and seals](https://md.mova.elamur.ai/free/en/corpora/questions/biology/27-dolphins-porpoises-and-seals/)

