---
title: Ascertain the function of insulation in the roof and walls of a house. — Saving water and energy at home · tree and pragmatics
description: Ascertain the function of insulation in the roof and walls of a house. Exam question 4 of lesson 89 «Saving water and energy at home» 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 wrong.
---

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# Exam question 4 · Saving water and energy at home

<!-- .ven lang=en -->
Ascertain the function of insulation in the roof and walls of a house.

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

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This is exam question 4 of lesson 89 «Saving water and energy at home» 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/89-saving-water-and-energy/#e4).

## The question {#question}

```conllu
# sent_id = question:world:89-saving-water-and-energy:e4:1
# text = Ascertain the function of insulation in the roof and walls of a house.
1	Ascertain	ascertain	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	function	function	NOUN	NN	Number=Sing	1	obj	_	_
4	of	of	ADP	IN	_	5	case	_	_
5	insulation	insulation	NOUN	NN	Number=Sing	3	nmod	_	_
6	in	in	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	roof	roof	NOUN	NN	Number=Sing	5	nmod	_	_
9	and	and	CCONJ	CC	_	10	cc	_	_
10	walls	wall	NOUN	NNS	Number=Plur	8	conj	_	_
11	of	of	ADP	IN	_	13	case	_	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
13	house	house	NOUN	NN	Number=Sing	10	nmod	_	SpaceAfter=No
14	.	.	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 function of insulation in the roof and walls of a house |  |  |  |  | vn discover-84 «NP V NP»: agent=Agent function=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 -->
It cools the house by admitting wind

```conllu
# sent_id = question:world:89-saving-water-and-energy:e4:o1:1
# text = It cools the house by admitting wind
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	cools	cool	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	house	house	NOUN	NN	Number=Sing	2	obj	_	_
5	by	by	SCONJ	IN	_	6	mark	_	_
6	admitting	admit	VERB	VBG	Tense=Pres|VerbForm=Part	2	advcl	_	_
7	wind	wind	NOUN	NN	Number=Sing	6	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **cool** | present | It | the house |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent house=Patient |
| 2 | **admit** *speech: other* | gerund |  | wind |  |  |  |  | vn admit-64.3-1 «NP V NP»: agent=Agent wind=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
It draws heat into the house from the ground

```conllu
# sent_id = question:world:89-saving-water-and-energy:e4:o2:1
# text = It draws heat into the house from the ground
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	draws	draw	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	heat	heat	NOUN	NN	Number=Sing	2	obj	_	_
4	into	into	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	house	house	NOUN	NN	Number=Sing	2	obl	_	_
7	from	from	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	ground	ground	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **draw** | present | It | heat |  | the house |  | from the ground | vn carry-11.4 «NP V NP PP.initial\_location»: agent=Agent heat=Theme from ground=Initial\_Location |

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

<!-- .ven lang=en -->
It keeps heat inside the house in winter

```conllu
# sent_id = question:world:89-saving-water-and-energy:e4:o3:1
# text = It keeps heat inside the house in winter
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	keeps	keep	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	heat	heat	NOUN	NN	Number=Sing	2	obj	_	_
4	inside	inside	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	house	house	NOUN	NN	Number=Sing	2	obl	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	winter	winter	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | It | heat |  | the house | winter |  | vn keep-15.2 «NP V NP PP.location»: agent=Agent heat=Theme inside house=Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
It increases the loss of heat in winter

```conllu
# sent_id = question:world:89-saving-water-and-energy:e4:o4:1
# text = It increases the loss of heat in winter
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	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	loss	loss	NOUN	NN	Number=Sing	2	obj	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	heat	heat	NOUN	NN	Number=Sing	4	nmod	_	_
7	in	in	ADP	IN	_	8	case	_	_
8	winter	winter	NOUN	NN	Number=Sing	2	obl	_	_
```

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

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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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