---
title: Ascertain the principal source of the greater part of the energy ava… — Energy — where it comes from and how t… · tree and pragmatics
description: Ascertain the principal source of the greater part of the energy available upon the Earth. Exam question 1 of lesson 56 «Energy — where it comes from and how to save it» of the world course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's c
---

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# Exam question 1 · Energy — where it comes from and how to save it

<!-- .ven lang=en -->
Ascertain the principal source of the greater part of the energy available upon the Earth.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you · **What happens:** ascertain · **To what, where:** principal source

<!-- .vabout -->
This is exam question 1 of lesson 56 «Energy — where it comes from and how to save it» of the world 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/world/56-energy/#e1).

## The question {#question}

```conllu
# sent_id = question:world:56-energy:e1:1
# text = Ascertain the principal source of the greater part of the energy available upon the Earth.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
3	principal	principal	ADJ	JJ	Degree=Pos	4	amod	_	_
4	source	source	NOUN	NN	Number=Sing	1	obj	_	_
5	of	of	ADP	IN	_	8	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
7	greater	great	ADJ	JJR	Degree=Cmp	8	amod	_	_
8	part	part	NOUN	NN	Number=Sing	4	nmod	_	_
9	of	of	ADP	IN	_	11	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	energy	energy	NOUN	NN	Number=Sing	8	nmod	_	_
12	available	available	ADJ	JJ	Degree=Pos	11	amod	_	_
13	upon	upon	ADP	IN	_	15	case	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	Earth	Earth	PROPN	NNP	Number=Sing	12	obl	_	SpaceAfter=No
16	.	.	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 source of the greater part of the energy |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent source=Topic |

<!-- .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 -->
The Earth's oceans

```conllu
# sent_id = question:world:56-energy:e1:o1:1
# text = The Earth's oceans
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Earth	Earth	PROPN	NNP	Number=Sing	4	nmod:poss	_	SpaceAfter=No
3	's	's	PART	POS	_	2	case	_	_
4	oceans	ocean	NOUN	NNS	Number=Plur	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
The Moon

```conllu
# sent_id = question:world:56-energy:e1:o2:1
# text = The Moon
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Moon	Moon	PROPN	NNP	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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

<!-- .ven lang=en -->
The Sun

```conllu
# sent_id = question:world:56-energy:e1:o3:1
# text = The Sun
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Sun	Sun	PROPN	NNP	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
The Earth's magnetism

```conllu
# sent_id = question:world:56-energy:e1:o4:1
# text = The Earth's magnetism
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	Earth	Earth	PROPN	NNP	Number=Sing	4	nmod:poss	_	SpaceAfter=No
3	's	's	PART	POS	_	2	case	_	_
4	magnetism	magnetism	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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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: [Energy — where it comes from and how t…, test 12](https://md.mova.elamur.ai/free/en/corpora/questions/world/56-energy/t12/)
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