---
title: Identify the principal source of energy by which the water cycle is… — The water cycle · tree and pragmatics
description: Identify the principal source of energy by which the water cycle is driven. Exam question 1 of lesson 14 «The water cycle» 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.
---

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# Exam question 1 · The water cycle

<!-- .ven lang=en -->
Identify the principal source of energy by which the water cycle is driven.

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** you, principal source · **What happens:** identify, drive · **To what, where:** principal source, water cycle

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This is exam question 1 of lesson 14 «The water cycle» 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/14-the-water-cycle/#e1).

## The question {#question}

```conllu
# sent_id = question:world:14-the-water-cycle:e1:1
# text = Identify the principal source of energy by which the water cycle is driven.
1	Identify	identify	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	_	6	case	_	_
6	energy	energy	NOUN	NN	Number=Sing	4	nmod	_	_
7	by	by	ADP	IN	_	8	case	_	_
8	which	which	PRON	WDT	PronType=Rel	13	obl	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	water	water	NOUN	NN	Number=Sing	11	compound	_	_
11	cycle	cycle	NOUN	NN	Number=Sing	13	nsubj:pass	_	_
12	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	13	aux:pass	_	_
13	driven	drive	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	acl	_	SpaceAfter=No
14	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the principal source of energy |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent source=Theme |
| 2 | **drive** | present · passive | the principal source of energy | the water cycle |  |  |  |  | vn nonvehicle-51.4.2-1 «NP V PP»: agent=Theme subject=Trajectory |

<!-- .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 -->
The gravitational pull of the Moon

```conllu
# sent_id = question:world:14-the-water-cycle:e1:o1:1
# text = The gravitational pull of the Moon
1	The	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
2	gravitational	gravitational	ADJ	JJ	Degree=Pos	3	amod	_	_
3	pull	pull	NOUN	NN	Number=Sing	0	root	_	_
4	of	of	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	Moon	Moon	PROPN	NNP	Number=Sing	3	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **pull** |  |  | the Moon |  |  |  |  | nom pull «act transitive»: of=patient |

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

<!-- .ven lang=en -->
The heat of the Sun

```conllu
# sent_id = question:world:14-the-water-cycle:e1:o2:1
# text = The heat of the Sun
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	heat	heat	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	Sun	Sun	PROPN	NNP	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **heat** |  | the Sun |  |  |  |  |  | nom heat «phenomenon intransitive»: of=agent |

### Option 3 {#o3}

<!-- .ven lang=en -->
The force of the wind alone

```conllu
# sent_id = question:world:14-the-water-cycle:e1:o3:1
# text = The force of the wind alone
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	force	force	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	wind	wind	NOUN	NN	Number=Sing	2	nmod	_	_
6	alone	alone	ADV	RB	_	5	advmod	_	_
```

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

### Option 4 {#o4}

<!-- .ven lang=en -->
The heat of the Earth's interior

```conllu
# sent_id = question:world:14-the-water-cycle:e1:o4:1
# text = The heat of the Earth's interior
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	heat	heat	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	7	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	Earth	Earth	PROPN	NNP	Number=Sing	7	nmod:poss	_	SpaceAfter=No
6	's	's	PART	POS	_	5	case	_	_
7	interior	interior	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **heat** |  | the Earth's interior |  |  |  |  |  | nom heat «phenomenon 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.

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