---
title: Why do many plants on a dark forest floor have very large leaves? — How plants make their food · tree and pragmatics
description: Why do many plants on a dark forest floor have very large leaves? Test 6 · ★ of lesson 22 «How plants make their food» 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 right.
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/world/22-photosynthesis/t6/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [World](https://md.mova.elamur.ai/free/en/corpora/questions/world/) / [How plants make their food](https://md.mova.elamur.ai/free/en/corpora/questions/world/22-photosynthesis/) / t6

# Test 6 · ★ · How plants make their food

<!-- .ven lang=en -->
Why do many plants on a dark forest floor have very large leaves?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** many plants · **What happens:** do, have · **To what, where:** large leaves

<!-- .vabout -->
This is test 6 · ★ of lesson 22 «How plants make their food» 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/22-photosynthesis/#t6).

## The question {#question}

```conllu
# sent_id = question:world:22-photosynthesis:t6:1
# text = Why do many plants on a dark forest floor have very large leaves?
1	Why	why	ADV	WRB	PronType=Int	2	advmod	_	_
2	do	do	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	10	advcl	_	_
3	many	many	ADJ	JJ	Degree=Pos	4	amod	_	_
4	plants	plant	NOUN	NNS	Number=Plur	10	nsubj	_	_
5	on	on	ADP	IN	_	9	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
7	dark	dark	ADJ	JJ	Degree=Pos	9	amod	_	_
8	forest	forest	NOUN	NN	Number=Sing	9	compound	_	_
9	floor	floor	NOUN	NN	Number=Sing	4	nmod	_	_
10	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
11	very	very	ADV	RB	_	12	advmod	_	_
12	large	large	ADJ	JJ	Degree=Pos	13	amod	_	_
13	leaves	leaf	NOUN	NNS	Number=Plur	10	obj	_	SpaceAfter=No
14	?	?	PUNCT	.	_	10	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **do** | present | many plants on a dark forest floor *not said here* |  |  |  |  |  | vn act-114-1 «NP V»: agent=Agent |
| 2 | **have** | present | many plants on a dark forest floor | large leaves |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent leaf=Patient |

<!-- .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 -->
To keep the rain off the soil

```conllu
# sent_id = question:world:22-photosynthesis:t6:o1:1
# text = To keep the rain off the soil
1	To	to	PART	TO	_	2	mark	_	_
2	keep	keep	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	rain	rain	NOUN	NN	Number=Sing	2	obj	_	_
5	off	off	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	soil	soil	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | to-infinitive |  | the rain |  |  |  | off the soil | vn keep-15.2 «NP V NP»: agent=Agent rain=Theme |

### Option 2 · ← Mova's choice · ✓ the right answer {#o2}

<!-- .ven lang=en -->
To catch the little light that reaches them

```conllu
# sent_id = question:world:22-photosynthesis:t6:o2:1
# text = To catch the little light that reaches them
1	To	to	PART	TO	_	2	mark	_	_
2	catch	catch	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	little	little	ADJ	JJ	Degree=Pos	5	amod	_	_
5	light	light	NOUN	NN	Number=Sing	2	obj	_	_
6	that	that	PRON	WDT	PronType=Rel	7	nsubj	_	_
7	reaches	reach	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	acl:relcl	_	_
8	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	7	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **catch** | to-infinitive |  | the little light |  |  |  |  | vn get-13.5.1 «NP V NP»: agent=Agent light=Theme |
| 2 | **reach** | present | the little light | them *= they* |  |  |  |  | vn body\_motion-49.2-1-1 «NP V NP ADV»: agent=Agent they=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
To hold more air inside them, like a balloon

```conllu
# sent_id = question:world:22-photosynthesis:t6:o3:1
# text = To hold more air inside them, like a balloon
1	To	to	PART	TO	_	2	mark	_	_
2	hold	hold	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	more	more	ADJ	JJR	Degree=Cmp	4	amod	_	_
4	air	air	NOUN	NN	Number=Sing	2	obj	_	_
5	inside	inside	ADP	IN	_	6	case	_	_
6	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	2	obl	_	SpaceAfter=No
7	,	,	PUNCT	,	_	10	punct	_	_
8	like	like	ADP	IN	_	10	case	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	balloon	balloon	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hold** | to-infinitive |  | more air |  |  |  | inside them *= they*; like a balloon | vn keep-15.2 «NP V NP PP.location»: agent=Agent air=Theme inside they=Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
To hide from the animals

```conllu
# sent_id = question:world:22-photosynthesis:t6:o4:1
# text = To hide from the animals
1	To	to	PART	TO	_	2	mark	_	_
2	hide	hide	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
3	from	from	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	animals	animal	NOUN	NNS	Number=Plur	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hide** | to-infinitive |  |  |  |  |  | from the animals | vn concealment-16-1 «NP V PP.beneficiary»: agent=Agent from animal=Beneficiary |

<!-- div src -->

**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 -->

<!-- pn -->
- ← previous: [How plants make their food, test 5](https://md.mova.elamur.ai/free/en/corpora/questions/world/22-photosynthesis/t5/)
- next →: [How plants make their food, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/world/22-photosynthesis/t7/)
- ↑ back to [How plants make their food](https://md.mova.elamur.ai/free/en/corpora/questions/world/22-photosynthesis/)