---
title: Why is it important to keep old forests as well as plant new trees? — Trees · tree and pragmatics
description: Why is it important to keep old forests as well as plant new trees? Test 10 · ★★★ of lesson 60 «Trees» 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 10 · ★★★ · Trees

<!-- .ven lang=en -->
Why is it important to keep old forests as well as plant new trees?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **What happens:** be, keep · **To what, where:** old forests

<!-- .vabout -->
This is test 10 · ★★★ of lesson 60 «Trees» 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/60-trees/#t10).

## The question {#question}

```conllu
# sent_id = question:biology:60-trees:t10:1
# text = Why is it important to keep old forests as well as plant new trees?
1	Why	why	ADV	WRB	PronType=Int	4	advmod	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	expl	_	_
4	important	important	ADJ	JJ	Degree=Pos	0	root	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	keep	keep	VERB	VB	VerbForm=Inf	4	csubj	_	_
7	old	old	ADJ	JJ	Degree=Pos	8	amod	_	_
8	forests	forest	NOUN	NNS	Number=Plur	6	obj	_	_
9	as	as	ADV	RB	ExtPos=CCONJ	12	cc	_	_
10	well	well	ADV	RB	Degree=Pos	9	fixed	_	_
11	as	as	ADP	IN	_	9	fixed	_	_
12	plant	plant	NOUN	NN	Number=Sing	4	parataxis	_	_
13	new	new	ADJ	JJ	Degree=Pos	14	amod	_	_
14	trees	tree	NOUN	NNS	Number=Plur	12	obj	_	SpaceAfter=No
15	?	?	PUNCT	.	_	4	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present |  |  |  |  |  | important *property* | tree rules |
| 2 | **keep** | to-infinitive |  | old forests |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent forest=Theme |

<!-- .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 -->
It isn't, one new tree does just the same job as a whole old forest

<!-- fold The tree, 16 words -->
```conllu
# sent_id = question:biology:60-trees:t10:o1:1
# text = It isn't, one new tree does just the same job as a whole old forest
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	nsubj	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	SpaceAfter=No
3	n't	not	PART	RB	Polarity=Neg	12	advmod	_	SpaceAfter=No
4	,	,	PUNCT	,	_	12	punct	_	_
5	one	one	NUM	CD	NumForm=Word|NumType=Card	7	nummod	_	_
6	new	new	ADJ	JJ	Degree=Pos	7	amod	_	_
7	tree	tree	NOUN	NN	Number=Sing	12	nsubj	_	_
8	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	aux	_	_
9	just	just	ADV	RB	_	12	advmod	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
11	same	same	ADJ	JJ	Degree=Pos	12	amod	_	_
12	job	job	NOUN	NN	Number=Sing	0	root	_	_
13	as	as	ADP	IN	_	17	case	_	_
14	a	a	DET	DT	Definite=Ind|PronType=Art	17	det	_	_
15	whole	whole	ADJ	JJ	Degree=Pos	17	amod	_	_
16	old	old	ADJ	JJ	Degree=Pos	17	amod	_	_
17	forest	forest	NOUN	NN	Number=Sing	12	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **is a** | present · do-support | It | the same job |  |  |  | as a whole old forest | tree rules |

### Option 2 {#o2}

<!-- .ven lang=en -->
Old trees make no oxygen at all

```conllu
# sent_id = question:biology:60-trees:t10:o2:1
# text = Old trees make no oxygen at all
1	Old	old	ADJ	JJ	Degree=Pos	2	amod	_	_
2	trees	tree	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	make	make	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	no	no	DET	DT	PronType=Neg	5	det	_	_
5	oxygen	oxygen	NOUN	NN	Number=Sing	3	obj	_	_
6	at	at	ADP	IN	_	7	case	_	_
7	all	all	DET	DT	PronType=Tot	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | present | Old trees | no oxygen |  | all |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset oxygen=Product |

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

<!-- .ven lang=en -->
Old forests hold lots of carbon and are home to many living things

```conllu
# sent_id = question:biology:60-trees:t10:o3:1
# text = Old forests hold lots of carbon and are home to many living things
1	Old	old	ADJ	JJ	Degree=Pos	2	amod	_	_
2	forests	forest	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	hold	hold	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	lots	lot	NOUN	NNS	Number=Plur	3	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	carbon	carbon	NOUN	NN	Number=Sing	4	nmod	_	_
7	and	and	CCONJ	CC	_	9	cc	_	_
8	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	cop	_	_
9	home	home	ADV	RB	_	3	conj	_	_
10	to	to	ADP	IN	_	13	case	_	_
11	many	many	ADJ	JJ	Degree=Pos	13	amod	_	_
12	living	living	ADJ	JJ	Degree=Pos	13	amod	_	_
13	things	thing	NOUN	NNS	Number=Plur	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **hold** | present | Old forests | lots of carbon |  |  |  | to many living things | vn keep-15.2 «NP V NP»: agent=Agent lot=Theme |
| 2 | **is** | present | Old forests *not said here* |  |  |  |  | home *property* | tree rules |

### Option 4 {#o4}

<!-- .ven lang=en -->
New trees are always better than old ones

```conllu
# sent_id = question:biology:60-trees:t10:o4:1
# text = New trees are always better than old ones
1	New	new	ADJ	JJ	Degree=Pos	2	amod	_	_
2	trees	tree	NOUN	NNS	Number=Plur	5	nsubj	_	_
3	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	5	cop	_	_
4	always	always	ADV	RB	PronType=Tot	5	advmod	_	_
5	better	good	ADJ	JJR	Degree=Cmp	0	root	_	_
6	than	than	ADP	IN	_	8	case	_	_
7	old	old	ADJ	JJ	Degree=Pos	8	amod	_	_
8	ones	one	NOUN	NNS	Number=Plur	5	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is** | present | New trees |  |  |  |  | than old ones; always, good *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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