---
title: What would happen if a decorator crab moved from a sponge reef to a… — Masters of camouflage · tree and pragmatics
description: What would happen if a decorator crab moved from a sponge reef to a seaweed patch? Test 9 · ★ of lesson 189 «Masters of camouflage» 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 9 · ★ · Masters of camouflage

<!-- .ven lang=en -->
What would happen if a decorator crab moved from a sponge reef to a seaweed patch?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 1 · wrong ✗ · **Who acts:** decorator crab · **What happens:** happen, move · **To what, where:** sponge reef

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This is test 9 · ★ of lesson 189 «Masters of camouflage» 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/189-masters-of-camouflage/#t9).

## The question {#question}

```conllu
# sent_id = question:biology:189-masters-of-camouflage:t9:1
# text = What would happen if a decorator crab moved from a sponge reef to a seaweed patch?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	if	if	SCONJ	IN	_	8	mark	_	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
6	decorator	decorator	NOUN	NN	Number=Sing	7	compound	_	_
7	crab	crab	NOUN	NN	Number=Sing	8	nsubj	_	_
8	moved	move	VERB	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	3	advcl	_	_
9	from	from	ADP	IN	_	12	case	_	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
11	sponge	sponge	NOUN	NN	Number=Sing	12	compound	_	_
12	reef	reef	NOUN	NN	Number=Sing	8	obl	_	_
13	to	to	ADP	IN	_	16	case	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	16	det	_	_
15	seaweed	seaweed	NOUN	NN	Number=Sing	16	compound	_	_
16	patch	patch	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
17	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **move** *a condition, not said to happen* | past | a decorator crab |  |  | a sponge reef |  | to a seaweed patch | vn slide-11.2 «NP V PP.initial\_location PP.destination»: agent=Theme from reef=Initial\_Location to patch=Destination |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
It would change its decorations to match

```conllu
# sent_id = question:biology:189-masters-of-camouflage:t9:o1:1
# text = It would change its decorations to match
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	change	change	VERB	VB	VerbForm=Inf	0	root	_	_
4	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
5	decorations	decoration	NOUN	NNS	Number=Plur	3	obj	_	_
6	to	to	PART	TO	_	7	mark	_	_
7	match	match	VERB	VB	VerbForm=Inf	3	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **change** | would | It | its decorations |  |  |  |  | vn dress-41.1.1-1-1 «NP V NP»: agent=Agent decoration=Patient |
| 2 | **match** | to-infinitive |  |  |  |  |  |  | vn amalgamate-22.2-1 «NP V ADVP-Middle»: agent=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It would turn green by itself

```conllu
# sent_id = question:biology:189-masters-of-camouflage:t9:o2:1
# text = It would turn green by itself
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	turn	turn	VERB	VB	VerbForm=Inf	0	root	_	_
4	green	green	ADJ	JJ	Degree=Pos	3	xcomp	_	_
5	by	by	ADP	IN	_	6	case	_	_
6	itself	itself	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs|Reflex=Yes	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **turn** | would | It |  |  |  |  | by itself *= it*; green *property* | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme by itself=Trajectory |

### Option 3 · ← Mova's choice {#o3}

<!-- .ven lang=en -->
It would shed its shell

```conllu
# sent_id = question:biology:189-masters-of-camouflage:t9:o3:1
# text = It would shed its shell
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	shed	shed	VERB	VB	VerbForm=Inf	0	root	_	_
4	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	5	nmod:poss	_	_
5	shell	shell	NOUN	NN	Number=Sing	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **shed** | would | It | its shell |  |  |  |  | vn substance\_emission-43.4-1 «PP.location V NP»: agent=Location shell=Source |

### Option 4 {#o4}

<!-- .ven lang=en -->
It would stay dressed in the same sponge forever

```conllu
# sent_id = question:biology:189-masters-of-camouflage:t9:o4:1
# text = It would stay dressed in the same sponge forever
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	stay	stay	VERB	VB	VerbForm=Inf	0	root	_	_
4	dressed	dress	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	xcomp	_	_
5	in	in	ADP	IN	_	8	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	same	same	ADJ	JJ	Degree=Pos	8	amod	_	_
8	sponge	sponge	NOUN	NN	Number=Sing	4	obl	_	_
9	forever	forever	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stay** | would | It |  |  |  |  | forever *property* | tree rules |
| 2 | **dress** | participle |  |  |  | the same sponge |  |  | vn dress-41.1.1-1-1 «NP V»: agent=Agent |

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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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