---
title: Ascertain the principal environmental objection to the combustion of… — Fuels, the Sun and saving energy · tree and pragmatics
description: Ascertain the principal environmental objection to the combustion of fossil fuels. Exam question 3 of lesson 32 «Fuels, the Sun and saving energy» of the physics course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Exam question 3 · Fuels, the Sun and saving energy

<!-- .ven lang=en -->
Ascertain the principal environmental objection to the combustion of fossil fuels.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, fossil fuels · **What happens:** ascertain, combust · **To what, where:** principal environmental objection

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This is exam question 3 of lesson 32 «Fuels, the Sun and saving energy» of the physics 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/physics/32-fuels-the-sun-and-saving-energy/#e3).

## The question {#question}

```conllu
# sent_id = question:physics:32-fuels-the-sun-and-saving-energy:e3:1
# text = Ascertain the principal environmental objection to the combustion of fossil fuels.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	5	amod	_	_
4	environmental	environmental	ADJ	JJ	Degree=Pos	5	amod	_	_
5	objection	objection	NOUN	NN	Number=Sing	1	obj	_	_
6	to	to	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	combustion	combustion	NOUN	NN	Number=Sing	5	nmod	_	_
9	of	of	ADP	IN	_	11	case	_	_
10	fossil	fossil	NOUN	NN	Number=Sing	11	compound	_	_
11	fuels	fuel	NOUN	NNS	Number=Plur	8	nmod	_	SpaceAfter=No
12	.	.	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 principal environmental objection |  |  |  | to the combustion of fossil fuels | vn discover-84 «NP V NP»: agent=Agent objection=Topic |
| 2 | **combust** |  | fossil fuels |  |  |  |  |  | nom combustion «process intransitive»: of=agent |

<!-- .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 · ✓ the right answer {#o1}

<!-- .ven lang=en -->
It releases carbon dioxide into the atmosphere, thereby warming the planet

```conllu
# sent_id = question:physics:32-fuels-the-sun-and-saving-energy:e3:o1:1
# text = It releases carbon dioxide into the atmosphere, thereby warming the planet
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	releases	release	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	carbon	carbon	NOUN	NN	Number=Sing	4	compound	_	_
4	dioxide	dioxide	NOUN	NN	Number=Sing	2	obj	_	_
5	into	into	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	atmosphere	atmosphere	NOUN	NN	Number=Sing	2	obl	_	SpaceAfter=No
8	,	,	PUNCT	,	_	10	punct	_	_
9	thereby	thereby	ADV	RB	_	10	advmod	_	_
10	warming	warm	VERB	VBG	Tense=Pres|VerbForm=Part	2	advcl	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	planet	planet	NOUN	NN	Number=Sing	10	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **release** | present | It | carbon dioxide |  | the atmosphere |  |  | vn free-10.6.3-1 «NP V NP S\_ING»: agent=Causer dioxide=Source |
| 2 | **warm** | gerund |  | the planet |  |  |  | thereby *property* | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent planet=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It causes the oceans to freeze

```conllu
# sent_id = question:physics:32-fuels-the-sun-and-saving-energy:e3:o2:1
# text = It causes the oceans to freeze
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	causes	cause	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	oceans	ocean	NOUN	NNS	Number=Plur	2	obj	_	_
5	to	to	PART	TO	_	6	mark	_	_
6	freeze	freeze	VERB	VB	VerbForm=Inf	2	advcl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cause** | present | It | the oceans |  |  |  |  | vn engender-27.1-1 «NP V NP»: agent=Precondition ocean=Patient |
| 2 | **freeze** | to-infinitive |  |  |  |  |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
It renders the generated electricity excessively powerful

```conllu
# sent_id = question:physics:32-fuels-the-sun-and-saving-energy:e3:o3:1
# text = It renders the generated electricity excessively powerful
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	renders	render	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	generated	generate	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	5	amod	_	_
5	electricity	electricity	NOUN	NN	Number=Sing	2	obj	_	_
6	excessively	excessively	ADV	RB	_	7	advmod	_	_
7	powerful	powerful	ADJ	JJ	Degree=Pos	5	amod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **render** | present | It | the generated electricity |  |  |  |  | vn give-13.1 «NP V NP»: agent=Agent electricity=Theme |
| 2 | **generate** | participle |  |  |  |  |  |  | vn grow-26.2.1 «NP.patient V PP.product»: agent=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
It depletes the oxygen supply of every household

```conllu
# sent_id = question:physics:32-fuels-the-sun-and-saving-energy:e3:o4:1
# text = It depletes the oxygen supply of every household
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	depletes	deplete	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	oxygen	oxygen	NOUN	NN	Number=Sing	5	compound	_	_
5	supply	supply	NOUN	NN	Number=Sing	2	obj	_	_
6	of	of	ADP	IN	_	8	case	_	_
7	every	every	DET	DT	PronType=Tot	8	det	_	_
8	household	household	NOUN	NN	Number=Sing	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **deplete** | present | It | the oxygen supply of every household |  |  |  |  | vn deprive-10.6.2 «NP V NP»: agent=Agent supply=Source |

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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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