---
title: Ascertain the reason for which the reduction of artificial illuminat… — What a child can do for nature · tree and pragmatics
description: Ascertain the reason for which the reduction of artificial illumination at night is advised. Exam question 3 of lesson 285 «What a child can do for nature» 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 wr
---

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# Exam question 3 · What a child can do for nature

<!-- .ven lang=en -->
Ascertain the reason for which the reduction of artificial illumination at night is advised.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you · **What happens:** ascertain, advise, reduce · **To what, where:** reason, reduction, artificial illumination

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This is exam question 3 of lesson 285 «What a child can do for nature» 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/285-what-a-child-can-do-for-nature/#e3).

## The question {#question}

```conllu
# sent_id = question:biology:285-what-a-child-can-do-for-nature:e3:1
# text = Ascertain the reason for which the reduction of artificial illumination at night is advised.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
4	for	for	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	14	obl	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	reduction	reduction	NOUN	NN	Number=Sing	14	nsubj:pass	_	_
8	of	of	ADP	IN	_	10	case	_	_
9	artificial	artificial	ADJ	JJ	Degree=Pos	10	amod	_	_
10	illumination	illumination	NOUN	NN	Number=Sing	7	nmod	_	_
11	at	at	ADP	IN	_	12	case	_	_
12	night	night	NOUN	NN	Number=Sing	10	nmod	_	_
13	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	14	aux:pass	_	_
14	advised	advise	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl:relcl	_	SpaceAfter=No
15	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **ascertain** | imperative | you *not said here* | the reason |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent reason=Topic |
| 2 | **advise** *speech: other* | present · passive |  | the reduction of artificial illumination at night |  |  |  | for the reason | vn advise-37.9-1 «NP V NP.recipient»: subject=Recipient |
| 3 | **reduce** |  |  | artificial illumination at night |  |  |  |  | nom reduction «act transitive»: of=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 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
Darkness increases the population of rodents

```conllu
# sent_id = question:biology:285-what-a-child-can-do-for-nature:e3:o1:1
# text = Darkness increases the population of rodents
1	Darkness	darkness	NOUN	NN	Number=Sing	2	nsubj	_	_
2	increases	increase	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
4	population	population	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	rodents	rodent	NOUN	NNS	Number=Plur	4	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **increase** | present | Darkness | the population of rodents |  |  |  |  | vn caused\_calibratable\_cos-45.6.2-1 «NP V NP.patient»: agent=Causer population=Patient |

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

<!-- .ven lang=en -->
Bright lights disorient moths, migrating birds and hatchling turtles

```conllu
# sent_id = question:biology:285-what-a-child-can-do-for-nature:e3:o2:1
# text = Bright lights disorient moths, migrating birds and hatchling turtles
1	Bright	bright	ADJ	JJ	Degree=Pos	2	amod	_	_
2	lights	light	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	disorient	disorient	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	moths	moth	NOUN	NNS	Number=Plur	3	obj	_	SpaceAfter=No
5	,	,	PUNCT	,	_	7	punct	_	_
6	migrating	migrate	VERB	VBG	VerbForm=Ger	7	amod	_	_
7	birds	bird	NOUN	NNS	Number=Plur	4	conj	_	_
8	and	and	CCONJ	CC	_	10	cc	_	_
9	hatchling	hatchling	NOUN	NN	Number=Sing	10	compound	_	_
10	turtles	turtle	NOUN	NNS	Number=Plur	4	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **disorient** | present | Bright lights | moths and migrating birds and hatchling turtles |  |  |  |  | tree rules |
| 2 | **migrate** | gerund |  |  |  |  |  |  | tree rules |

### Option 3 {#o3}

<!-- .ven lang=en -->
Illumination causes flowers to close prematurely

```conllu
# sent_id = question:biology:285-what-a-child-can-do-for-nature:e3:o3:1
# text = Illumination causes flowers to close prematurely
1	Illumination	illumination	NOUN	NN	Number=Sing	2	nsubj	_	_
2	causes	cause	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	flowers	flower	NOUN	NNS	Number=Plur	2	obj	_	_
4	to	to	PART	TO	_	5	mark	_	_
5	close	close	VERB	VB	VerbForm=Inf	2	xcomp	_	_
6	prematurely	prematurely	ADV	RB	_	5	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | Illumination | flowers |  |  |  |  | tree rules |
| 2 | **close** | to-infinitive | flowers *not said here* |  |  |  |  | prematurely *property* | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Artificial light accelerates the growth of weeds

```conllu
# sent_id = question:biology:285-what-a-child-can-do-for-nature:e3:o4:1
# text = Artificial light accelerates the growth of weeds
1	Artificial	artificial	ADJ	JJ	Degree=Pos	2	amod	_	_
2	light	light	NOUN	NN	Number=Sing	3	nsubj	_	_
3	accelerates	accelerate	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	growth	growth	NOUN	NN	Number=Sing	3	obj	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	weeds	weed	NOUN	NNS	Number=Plur	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **accelerate** | present | Artificial light | the growth of weeds |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent growth=Patient |
| 2 | **grow** |  | weeds |  |  |  |  |  | nom growth «process intransitive»: of=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.

<!-- /div -->

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