---
title: Ascertain the reason for which electric senses occur predominantly a… — Electric senses: electric eels, sharks… · tree and pragmatics
description: Ascertain the reason for which electric senses occur predominantly among aquatic animals. Exam question 4 of lesson 231 «Electric senses: electric eels, sharks, the platypus bill and charged bees» 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 · Electric senses: electric eels, sharks, the platypus bill…

<!-- .ven lang=en -->
Ascertain the reason for which electric senses occur predominantly among aquatic animals.

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**Mova's choice:** option 3 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, electric senses · **What happens:** ascertain, occur · **To what, where:** reason

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This is exam question 4 of lesson 231 «Electric senses: electric eels, sharks, the platypus bill and charged bees» 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/231-electric-senses-eels-sharks-the-platypus-and-charged-bees/#e4).

## The question {#question}

```conllu
# sent_id = question:biology:231-electric-senses-eels-sharks-the-platypus-and-charged-bees:e4:1
# text = Ascertain the reason for which electric senses occur predominantly among aquatic animals.
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	8	obl	_	_
6	electric	electric	ADJ	JJ	Degree=Pos	7	amod	_	_
7	senses	sens	NOUN	NNS	Number=Plur	8	nsubj	_	_
8	occur	occur	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	acl:relcl	_	_
9	predominantly	predominantly	ADV	RB	_	8	advmod	_	_
10	among	among	ADP	IN	_	12	case	_	_
11	aquatic	aquatic	ADJ	JJ	Degree=Pos	12	amod	_	_
12	animals	animal	NOUN	NNS	Number=Plur	8	obl	_	SpaceAfter=No
13	.	.	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 | **occur** | present | electric senses |  |  |  |  | for the reason; among aquatic animals; predominantly *property* | vn occur-48.3-1 «NP V PP»: agent=Theme among animal=Location |

<!-- .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 -->
Electric fields cannot be generated by any animal upon dry land

```conllu
# sent_id = question:biology:231-electric-senses-eels-sharks-the-platypus-and-charged-bees:e4:o1:1
# text = Electric fields cannot be generated by any animal upon dry land
1	Electric	electric	ADJ	JJ	Degree=Pos	2	amod	_	_
2	fields	field	NOUN	NNS	Number=Plur	6	nsubj:pass	_	_
3	can	can	AUX	MD	VerbForm=Fin	6	aux	_	SpaceAfter=No
4	not	not	PART	RB	Polarity=Neg	6	advmod	_	_
5	be	be	AUX	VB	VerbForm=Inf	6	aux:pass	_	_
6	generated	generate	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
7	by	by	ADP	IN	_	9	case	_	_
8	any	any	DET	DT	PronType=Ind	9	det	_	_
9	animal	animal	NOUN	NN	Number=Sing	6	obl	_	_
10	upon	upon	ADP	IN	_	12	case	_	_
11	dry	dry	ADJ	JJ	Degree=Pos	12	amod	_	_
12	land	land	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **generate** | can · passive | any animal | Electric fields |  |  |  | upon dry land | vn birth-28.2-1 «NP V NP»: agent=Agent subject=Patient |

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

<!-- .ven lang=en -->
Water conducts electricity far more effectively than air

```conllu
# sent_id = question:biology:231-electric-senses-eels-sharks-the-platypus-and-charged-bees:e4:o2:1
# text = Water conducts electricity far more effectively than air
1	Water	water	NOUN	NN	Number=Sing	2	nsubj	_	_
2	conducts	conduct	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	electricity	electricity	NOUN	NN	Number=Sing	2	obj	_	_
4	far	far	ADV	RB	Degree=Pos	5	advmod	_	_
5	more	more	ADV	RBR	Degree=Cmp	6	advmod	_	_
6	effectively	effectively	ADV	RB	_	2	advmod	_	_
7	than	than	ADP	IN	_	8	case	_	_
8	air	air	NOUN	NN	Number=Sing	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **conduct** | present | Water | electricity |  |  |  | effectively *property* | vn accompany-51.7 «NP V NP»: agent=Agent electricity=Theme |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
Light is entirely absent from all waters

```conllu
# sent_id = question:biology:231-electric-senses-eels-sharks-the-platypus-and-charged-bees:e4:o3:1
# text = Light is entirely absent from all waters
1	Light	light	NOUN	NN	Number=Sing	4	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	entirely	entirely	ADV	RB	_	4	advmod	_	_
4	absent	absent	ADJ	JJ	Degree=Pos	0	root	_	_
5	from	from	ADP	IN	_	7	case	_	_
6	all	all	DET	DT	PronType=Tot	7	det	_	_
7	waters	water	NOUN	NNS	Number=Plur	4	obl	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
Aquatic animals possess no other senses

```conllu
# sent_id = question:biology:231-electric-senses-eels-sharks-the-platypus-and-charged-bees:e4:o4:1
# text = Aquatic animals possess no other senses
1	Aquatic	aquatic	ADJ	JJ	Degree=Pos	2	amod	_	_
2	animals	animal	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	possess	possess	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	no	no	DET	DT	PronType=Neg	6	det	_	_
5	other	other	ADJ	JJ	Degree=Pos	6	amod	_	_
6	senses	sens	NOUN	NNS	Number=Plur	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **possess** | present | Aquatic animals | no other senses |  |  |  |  | vn own-100.1 «NP V NP»: agent=Pivot sens=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.

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- ↑ back to [Electric senses: electric eels, sharks, the platypus bill and charged bees](https://md.mova.elamur.ai/free/en/corpora/questions/biology/231-electric-senses-eels-sharks-the-platypus-and-charged-bees/)