---
title: Why does a dolphin hunting in muddy water not need clear eyesight? — Senses of animals: how they see, hear… · tree and pragmatics
description: Why does a dolphin hunting in muddy water not need clear eyesight? Test 8 · ★★ of lesson 79 «Senses of animals: how they see, hear and smell» of the world 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 8 · ★★ · Senses of animals: how they see, hear and smell

<!-- .ven lang=en -->
Why does a dolphin hunting in muddy water not need clear eyesight?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **What happens:** do, not need · **To what, where:** dolphin hunting, muddy water, clear eyesight

<!-- .vabout -->
This is test 8 · ★★ of lesson 79 «Senses of animals: how they see, hear and smell» of the world 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/world/79-senses-of-animals/#t8).

## The question {#question}

```conllu
# sent_id = question:world:79-senses-of-animals:t8:1
# text = Why does a dolphin hunting in muddy water not need clear eyesight?
1	Why	why	ADV	WRB	PronType=Int	2	advmod	_	_
2	does	do	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	advcl	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	dolphin	dolphin	NOUN	NN	Number=Sing	5	compound	_	_
5	hunting	hunting	NOUN	NN	Number=Sing	2	obj	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	muddy	muddy	ADJ	JJ	Degree=Pos	8	amod	_	_
8	water	water	NOUN	NN	Number=Sing	2	obl	_	_
9	not	not	PART	RB	Polarity=Neg	10	advmod	_	_
10	need	need	VERB	VBP	Mood=Ind|Number=Sing|Person=1|Tense=Pres|VerbForm=Fin	0	root	_	_
11	clear	clear	ADJ	JJ	Degree=Pos	12	amod	_	_
12	eyesight	eyesight	NOUN	NN	Number=Sing	10	obj	_	SpaceAfter=No
13	?	?	PUNCT	.	_	10	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **do** | present |  | a dolphin hunting |  | muddy water |  |  | vn act-114-1 «NP V NP»: agent=Agent hunting=Eventuality |
| 2 | **not** **need** | present |  | clear eyesight |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot eyesight=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 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
It catches only fish that glow

```conllu
# sent_id = question:world:79-senses-of-animals:t8:o1:1
# text = It catches only fish that glow
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	catches	catch	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	only	only	ADV	RB	_	4	advmod	_	_
4	fish	fish	NOUN	NNS	Number=Plur	2	obj	_	_
5	that	that	PRON	WDT	PronType=Rel	6	nsubj	_	_
6	glow	glow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	4	acl:relcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **catch** | present | It | fish |  |  |  |  | vn get-13.5.1 «NP V NP»: agent=Agent fish=Theme |
| 2 | **glow** | present | fish |  |  |  |  |  | vn light\_emission-43.1 «NP V»: agent=Theme |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
It finds fish by their echoes

```conllu
# sent_id = question:world:79-senses-of-animals:t8:o2:1
# text = It finds fish by their echoes
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	finds	find	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	fish	fish	NOUN	NNS	Number=Plur	2	obj	_	_
4	by	by	ADP	IN	_	6	case	_	_
5	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	6	nmod:poss	_	_
6	echoes	echo	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **find** | present | It | fish |  |  |  | by fish's echoes | vn discover-84 «NP V NP»: agent=Agent fish=Topic |

### Option 3 {#o3}

<!-- .ven lang=en -->
It smells fish through its skin

```conllu
# sent_id = question:world:79-senses-of-animals:t8:o3:1
# text = It smells fish through its skin
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	smells	smell	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	fish	fish	NOUN	NN	Number=Sing	2	obj	_	_
4	through	through	ADP	IN	_	6	case	_	_
5	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	6	nmod:poss	_	_
6	skin	skin	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **smell** | present | It | fish |  | fish's skin |  |  | vn stalk-35.3 «NP V NP PP.location»: agent=Agent fish=Theme through skin=Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
It waits for fish to touch it

```conllu
# sent_id = question:world:79-senses-of-animals:t8:o4:1
# text = It waits for fish to touch it
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	waits	wait	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	for	for	ADP	IN	_	4	case	_	_
4	fish	fish	NOUN	NN	Number=Sing	2	obl	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	touch	touch	VERB	VB	VerbForm=Inf	2	advcl	_	_
7	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	6	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **wait** | present | It |  |  |  |  | for fish | vn exist-47.1 «NP V»: agent=Theme |
| 2 | **touch** | to-infinitive |  | fish |  |  |  |  | vn contiguous\_location-47.8-1 «NP V NP»: agent=Theme it=Co-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.

<!-- /div -->

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- ← previous: [Senses of animals: how they see, hear…, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/world/79-senses-of-animals/t7/)
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