---
title: my sister says predators are bad for a habitat and we should get rid… — Balance in a food web · tree and pragmatics
description: my sister says predators are bad for a habitat and we should get rid of them. true? Test 13 · ★★★ of lesson 30 «Balance in a food web» 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 13 · ★★★ · Balance in a food web

<!-- .ven lang=en -->
my sister says predators are bad for a habitat and we should get rid of them. true?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** sister, predators, we · **What happens:** say, be, get · **Speech:** someone speaks here

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This is test 13 · ★★★ of lesson 30 «Balance in a food web» 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/30-balance-in-food-webs/#t13).

## The question {#question}

```conllu
# sent_id = question:world:30-balance-in-food-webs:t13:1
# text = my sister says predators are bad for a habitat and we should get rid of them. true?
1	my	my	PRON	PRP$	Case=Gen|Number=Sing|Person=1|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	sister	sister	NOUN	NN	Number=Sing	3	nsubj	_	_
3	says	say	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	predators	predator	NOUN	NNS	Number=Plur	6	nsubj	_	_
5	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
6	bad	bad	ADJ	JJ	Degree=Pos	3	ccomp	_	_
7	for	for	ADP	IN	_	9	case	_	_
8	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
9	habitat	habitat	NOUN	NN	Number=Sing	6	obl	_	_
10	and	and	CCONJ	CC	_	13	cc	_	_
11	we	we	PRON	PRP	Case=Nom|Number=Plur|Person=1|PronType=Prs	13	nsubj	_	_
12	should	should	AUX	MD	VerbForm=Fin	13	aux	_	_
13	get	get	VERB	VB	VerbForm=Inf	3	conj	_	_
14	rid	rid	ADJ	JJ	Degree=Pos	13	xcomp	_	_
15	of	of	ADP	IN	_	16	case	_	_
16	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	14	obl	_	SpaceAfter=No
17	.	.	PUNCT	.	_	13	punct	_	_
18	true	true	ADJ	JJ	Degree=Pos	13	xcomp	_	SpaceAfter=No
19	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **say** *speech: assert* | present | my sister |  |  |  |  |  | vn say-37.7-1-1 «NP V that S»: agent=Agent |
| 2 | **is** | present | predators |  |  |  |  | for a habitat; bad *property* | tree rules |
| 3 | **get** | should | we |  |  |  |  | rid, true *property* | vn comprehend-87.2-1 «NP V S\_ING»: agent=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 -->
No, but only because they eat the plants

```conllu
# sent_id = question:world:30-balance-in-food-webs:t13:o1:1
# text = No, but only because they eat the plants
1	No	no	INTJ	UH	Polarity=Neg	7	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	7	punct	_	_
3	but	but	CCONJ	CC	_	7	cc	_	_
4	only	only	ADV	RB	_	7	advmod	_	_
5	because	because	SCONJ	IN	_	7	mark	_	_
6	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	7	nsubj	_	_
7	eat	eat	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	plants	plant	NOUN	NNS	Number=Plur	7	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **eat** | present | they | the plants |  |  |  |  | vn eat-39.1-1 «NP V NP»: agent=Agent plant=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
Yes, without them all animals live in peace

```conllu
# sent_id = question:world:30-balance-in-food-webs:t13:o2:1
# text = Yes, without them all animals live in peace
1	Yes	yes	INTJ	UH	Polarity=Pos	7	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	7	punct	_	_
3	without	without	ADP	IN	_	4	case	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	7	obl	_	_
5	all	all	DET	DT	PronType=Tot	6	det	_	_
6	animals	animal	NOUN	NNS	Number=Plur	7	nsubj	_	_
7	live	live	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	in	in	ADP	IN	_	9	case	_	_
9	peace	peace	NOUN	NN	Number=Sing	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **live** | present | all animals |  |  | peace |  | without them *= they* | vn lodge-46 «NP V PP.location»: agent=Theme in peace=Location |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
No, they keep plant-eaters from growing too many

```conllu
# sent_id = question:world:30-balance-in-food-webs:t13:o3:1
# text = No, they keep plant-eaters from growing too many
1	No	no	INTJ	UH	Polarity=Neg	4	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	4	punct	_	_
3	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	4	nsubj	_	_
4	keep	keep	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	plant	plant	NOUN	NN	Number=Sing	7	compound	_	SpaceAfter=No
6	-	-	PUNCT	HYPH	_	5	punct	_	SpaceAfter=No
7	eaters	eater	NOUN	NNS	Number=Plur	4	obj	_	_
8	from	from	SCONJ	IN	_	9	mark	_	_
9	growing	grow	VERB	VBG	Tense=Pres|VerbForm=Part	4	advcl	_	_
10	too	too	ADV	RB	_	11	advmod	_	_
11	many	many	ADJ	JJ	Degree=Pos	9	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | they | plant eaters |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent eater=Theme |
| 2 | **grow** | gerund | they *not said here* | many |  |  |  |  | vn appear-48.1.1 «PP.location V NP»: agent=Location many=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
Yes, a habitat is healthier with no predators

```conllu
# sent_id = question:world:30-balance-in-food-webs:t13:o4:1
# text = Yes, a habitat is healthier with no predators
1	Yes	yes	INTJ	UH	Polarity=Pos	6	discourse	_	SpaceAfter=No
2	,	,	PUNCT	,	_	1	punct	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	habitat	habitat	NOUN	NN	Number=Sing	6	nsubj	_	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	_	_
6	healthier	healthy	ADJ	JJR	Degree=Cmp	0	root	_	_
7	with	with	ADP	IN	_	9	case	_	_
8	no	no	DET	DT	PronType=Neg	9	det	_	_
9	predators	predator	NOUN	NNS	Number=Plur	6	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | a habitat |  |  |  |  | with no predators; healthy *property* | tree rules |

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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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- ← previous: [Balance in a food web, test 12](https://md.mova.elamur.ai/free/en/corpora/questions/world/30-balance-in-food-webs/t12/)
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