---
title: Identify the principal reason for which the clownfish is not harmed… — The aquarium: the coral reef tank · tree and pragmatics
description: Identify the principal reason for which the clownfish is not harmed by the tentacles of the sea anemone. Exam question 1 of lesson 90 «The aquarium: the coral reef tank» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's
---

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# Exam question 1 · The aquarium: the coral reef tank

<!-- .ven lang=en -->
Identify the principal reason for which the clownfish is not harmed by the tentacles of the sea anemone.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you, tentacles · **What happens:** identify, not harm · **To what, where:** principal reason, clownfish

<!-- .vabout -->
This is exam question 1 of lesson 90 «The aquarium: the coral reef tank» 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/90-aquarium-the-coral-reef-tank/#e1).

## The question {#question}

```conllu
# sent_id = question:biology:90-aquarium-the-coral-reef-tank:e1:1
# text = Identify the principal reason for which the clownfish is not harmed by the tentacles of the sea anemone.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	11	obl	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	clownfish	clownfish	NOUN	NN	Number=Sing	11	nsubj:pass	_	_
9	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	11	aux:pass	_	_
10	not	not	PART	RB	Polarity=Neg	11	advmod	_	_
11	harmed	harm	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	acl	_	_
12	by	by	ADP	IN	_	14	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	14	det	_	_
14	tentacles	tentacle	NOUN	NNS	Number=Plur	11	obl	_	_
15	of	of	ADP	IN	_	18	case	_	_
16	the	the	DET	DT	Definite=Def|PronType=Art	18	det	_	_
17	sea	sea	NOUN	NN	Number=Sing	18	compound	_	_
18	anemone	anemone	NOUN	NN	Number=Sing	14	nmod	_	SpaceAfter=No
19	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **not** **harm** | present · passive | the tentacles of the sea anemone | the clownfish |  |  |  | for the principal reason | vn amuse-31.1 «NP V NP»: agent=Stimulus subject=Experiencer |

<!-- .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 -->
Sea anemones possess no stinging cells

```conllu
# sent_id = question:biology:90-aquarium-the-coral-reef-tank:e1:o1:1
# text = Sea anemones possess no stinging cells
1	Sea	sea	NOUN	NN	Number=Sing	2	compound	_	_
2	anemones	anemone	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	stinging	stinging	NOUN	NN	Number=Sing	6	compound	_	_
6	cells	cell	NOUN	NNS	Number=Plur	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **possess** | present | Sea anemones | no stinging cells |  |  |  |  | vn own-100.1 «NP V NP»: agent=Pivot cell=Theme |

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

<!-- .ven lang=en -->
A protective mucus upon its skin prevents the stinging

```conllu
# sent_id = question:biology:90-aquarium-the-coral-reef-tank:e1:o2:1
# text = A protective mucus upon its skin prevents the stinging
1	A	a	DET	DT	Definite=Ind|PronType=Art	3	det	_	_
2	protective	protective	ADJ	JJ	Degree=Pos	3	amod	_	_
3	mucus	mucus	NOUN	NN	Number=Sing	7	nsubj	_	_
4	upon	upon	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	3	nmod	_	_
7	prevents	prevent	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	stinging	stinging	NOUN	NN	Number=Sing	7	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **prevent** | present | a protective mucus upon mucus's skin | the stinging |  |  |  |  | vn forbid-64.4-1 «NP V NP»: agent=Causer stinging=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
It possesses an armoured shell

```conllu
# sent_id = question:biology:90-aquarium-the-coral-reef-tank:e1:o3:1
# text = It possesses an armoured shell
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	possesses	possess	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	an	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	armoured	armoured	ADJ	JJ	Degree=Pos	5	amod	_	_
5	shell	shell	NOUN	NN	Number=Sing	2	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **possess** | present | It | a armoured shell |  |  |  |  | vn own-100.1 «NP V NP»: agent=Pivot shell=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
It moves too swiftly for the stinging cells to be discharged

```conllu
# sent_id = question:biology:90-aquarium-the-coral-reef-tank:e1:o4:1
# text = It moves too swiftly for the stinging cells to be discharged
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	moves	move	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	too	too	ADV	RB	_	4	advmod	_	_
4	swiftly	swiftly	ADV	RB	_	2	advmod	_	_
5	for	for	ADP	IN	_	8	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	stinging	sting	VERB	VBG	Tense=Pres|VerbForm=Part	8	amod	_	_
8	cells	cell	NOUN	NNS	Number=Plur	2	obl	_	_
9	to	to	PART	TO	_	11	mark	_	_
10	be	be	AUX	VB	VerbForm=Inf	11	aux:pass	_	_
11	discharged	discharge	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | present | It |  |  |  |  | for the stinging cells; swiftly *property* | vn roll-51.3.1 «NP.theme V»: agent=Theme |
| 2 | **sting** | gerund |  |  |  |  |  |  | vn amuse-31.1 «NP V ADV-Middle»: agent=Experiencer |
| 3 | **discharge** | to-infinitive · passive |  |  |  |  |  |  | vn banish-10.2 «NP V NP» |

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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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