---
title: Why might a desert fox have huge ears while an Arctic fox has tiny o… — Keeping warm and keeping cool: insulat… · tree and pragmatics
description: Why might a desert fox have huge ears while an Arctic fox has tiny ones? Test 8 · ★★★ of lesson 25 «Keeping warm and keeping cool: insulation and sweat» 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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# Test 8 · ★★★ · Keeping warm and keeping cool: insulation and sweat

<!-- .ven lang=en -->
Why might a desert fox have huge ears while an Arctic fox has tiny ones?

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 3 · right ✓ · **Who acts:** desert fox, Arctic fox · **What happens:** have · **To what, where:** huge ears, tiny ones

<!-- .vabout -->
This is test 8 · ★★★ of lesson 25 «Keeping warm and keeping cool: insulation and sweat» of the physics course of Mova's primary school. 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/25-keeping-warm-and-keeping-cool/#t8).

## The question {#question}

```conllu
# sent_id = question:physics:25-keeping-warm-and-keeping-cool:t8:1
# text = Why might a desert fox have huge ears while an Arctic fox has tiny ones?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	might	might	AUX	MD	VerbForm=Fin	5	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
4	desert	desert	NOUN	NN	Number=Sing	5	compound	_	_
5	fox	fox	NOUN	NN	Number=Sing	6	nsubj	_	_
6	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	huge	huge	ADJ	JJ	Degree=Pos	8	amod	_	_
8	ears	ear	NOUN	NNS	Number=Plur	6	obj	_	_
9	while	while	SCONJ	IN	_	13	mark	_	_
10	an	a	DET	DT	Definite=Ind|PronType=Art	12	det	_	_
11	Arctic	arctic	ADJ	JJ	Degree=Pos	12	amod	_	_
12	fox	fox	NOUN	NN	Number=Sing	13	nsubj	_	_
13	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	advcl	_	_
14	tiny	tiny	ADJ	JJ	Degree=Pos	15	amod	_	_
15	ones	one	NOUN	NNS	Number=Plur	13	obj	_	SpaceAfter=No
16	?	?	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | a desert fox | huge ears |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent ear=Patient |
| 2 | **have** | present | a Arctic fox | tiny ones |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent one=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 {#o1}

<!-- .ven lang=en -->
Arctic foxes have no use for ears

```conllu
# sent_id = question:physics:25-keeping-warm-and-keeping-cool:t8:o1:1
# text = Arctic foxes have no use for ears
1	Arctic	arctic	ADJ	JJ	Degree=Pos	2	amod	_	_
2	foxes	fox	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	have	have	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	no	no	DET	DT	PronType=Neg	5	det	_	_
5	use	use	NOUN	NN	Number=Sing	3	obj	_	_
6	for	for	ADP	IN	_	7	case	_	_
7	ears	ear	NOUN	NNS	Number=Plur	5	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | Arctic foxes | no use |  |  |  | for ears | vn birth-28.2-1 «NP V NP»: agent=Agent use=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
Desert foxes need to hear camels

```conllu
# sent_id = question:physics:25-keeping-warm-and-keeping-cool:t8:o2:1
# text = Desert foxes need to hear camels
1	Desert	desert	NOUN	NN	Number=Sing	2	compound	_	_
2	foxes	fox	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	to	to	PART	TO	_	5	mark	_	_
5	hear	hear	VERB	VB	VerbForm=Inf	3	xcomp	_	_
6	camels	camel	NOUN	NNS	Number=Plur	5	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present | Desert foxes |  |  |  |  |  | vn want-32.1-1-1 «NP V NP S\_INF»: agent=Pivot clause=Theme |
| 2 | **hear** *not said to happen* | to-infinitive | Desert foxes *not said here* | camels |  |  |  |  | vn see-30.1-1-1 «NP V S»: agent=Experiencer camel=Stimulus |

### Option 3 · ← Mova's choice · ✓ the right answer {#o3}

<!-- .ven lang=en -->
Big ears lose heat in the heat, small ears save heat in the cold

<!-- fold The tree, 14 words -->
```conllu
# sent_id = question:physics:25-keeping-warm-and-keeping-cool:t8:o3:1
# text = Big ears lose heat in the heat, small ears save heat in the cold
1	Big	big	ADJ	JJ	Degree=Pos	2	amod	_	_
2	ears	ear	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	lose	lose	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	heat	heat	NOUN	NN	Number=Sing	3	obj	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	heat	heat	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
8	,	,	PUNCT	,	_	11	punct	_	_
9	small	small	ADJ	JJ	Degree=Pos	10	amod	_	_
10	ears	ear	NOUN	NNS	Number=Plur	11	nsubj	_	_
11	save	save	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	3	parataxis	_	_
12	heat	heat	NOUN	NN	Number=Sing	11	obj	_	_
13	in	in	ADP	IN	_	15	case	_	_
14	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
15	cold	cold	NOUN	NN	Number=Sing	11	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **lose** | present | Big ears | heat |  | the heat |  |  | vn succeed-74-3-1 «NP V NP»: agent=Agent heat=Eventuality |
| 2 | **save** | present | small ears | heat |  | the cold |  |  | vn get-13.5.1-1 «NP V NP»: agent=Agent heat=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
Big ears grow only in sand

```conllu
# sent_id = question:physics:25-keeping-warm-and-keeping-cool:t8:o4:1
# text = Big ears grow only in sand
1	Big	big	ADJ	JJ	Degree=Pos	2	amod	_	_
2	ears	ear	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	grow	grow	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	only	only	ADV	RB	_	3	advmod	_	_
5	in	in	ADP	IN	_	6	case	_	_
6	sand	sand	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **grow** | present | Big ears |  |  | sand |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme in sand=Location |

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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 -->

<!-- pn -->
- ← previous: [Keeping warm and keeping cool: insulat…, test 7](https://md.mova.elamur.ai/free/en/corpora/questions/physics/25-keeping-warm-and-keeping-cool/t7/)
- next →: [Keeping warm and keeping cool: insulat…, test 9](https://md.mova.elamur.ai/free/en/corpora/questions/physics/25-keeping-warm-and-keeping-cool/t9/)
- ↑ back to [Keeping warm and keeping cool: insulation and sweat](https://md.mova.elamur.ai/free/en/corpora/questions/physics/25-keeping-warm-and-keeping-cool/)

