---
title: Why does a cooler echidna body need less food? — The platypus and the echidna: mammals… · tree and pragmatics
description: Why does a cooler echidna body need less food? Test 10 of lesson 43 «The platypus and the echidna: mammals that lay eggs» of the biology 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 10 · The platypus and the echidna: mammals that lay eggs

<!-- .ven lang=en -->
Why does a cooler echidna body need less food?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** cooler echidna body · **What happens:** need · **To what, where:** less food

<!-- .vabout -->
This is test 10 of lesson 43 «The platypus and the echidna: mammals that lay eggs» of the biology 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/biology/43-platypus-and-echidna/#t10).

## The question {#question}

```conllu
# sent_id = question:biology:43-platypus-and-echidna:t10:1
# text = Why does a cooler echidna body need less food?
1	Why	why	ADV	WRB	PronType=Int	7	advmod	_	_
2	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
4	cooler	cool	ADJ	JJR	Degree=Cmp	6	amod	_	_
5	echidna	echidna	NOUN	NN	Number=Sing	6	compound	_	_
6	body	body	NOUN	NN	Number=Sing	7	nsubj	_	_
7	need	need	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	less	less	ADJ	JJR	Degree=Cmp	9	amod	_	_
9	food	food	NOUN	NN	Number=Sing	7	obj	_	SpaceAfter=No
10	?	?	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **need** | present · do-support | a cooler echidna body | less food |  |  |  |  | vn want-32.1-1-1 «NP V NP ADV»: agent=Pivot food=Theme |

<!-- .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 -->
Keeping warm burns food, so a cooler body burns less

```conllu
# sent_id = question:biology:43-platypus-and-echidna:t10:o1:1
# text = Keeping warm burns food, so a cooler body burns less
1	Keeping	keep	VERB	VBG	VerbForm=Ger	10	csubj	_	_
2	warm	warm	ADJ	JJ	Degree=Pos	3	amod	_	_
3	burns	burn	NOUN	NNS	Number=Plur	4	compound	_	_
4	food	food	NOUN	NN	Number=Sing	1	obj	_	SpaceAfter=No
5	,	,	PUNCT	,	_	10	punct	_	_
6	so	so	ADV	RB	_	10	advmod	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	cooler	cool	ADJ	JJR	Degree=Cmp	9	amod	_	_
9	body	body	NOUN	NN	Number=Sing	10	nsubj	_	_
10	burns	burn	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
11	less	less	ADV	RBR	Degree=Cmp	10	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | gerund |  | burns food |  |  |  |  | vn keep-15.2 «NP V NP»: agent=Agent food=Theme |
| 2 | **burn** | present | a cooler body |  |  |  |  | less *property* | vn light\_emission-43.1 «NP V»: agent=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
Cold bodies can make their own food out of air and sunlight

```conllu
# sent_id = question:biology:43-platypus-and-echidna:t10:o2:1
# text = Cold bodies can make their own food out of air and sunlight
1	Cold	cold	ADJ	JJ	Degree=Pos	2	amod	_	_
2	bodies	body	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	can	can	AUX	MD	VerbForm=Fin	4	aux	_	_
4	make	make	VERB	VB	VerbForm=Inf	0	root	_	_
5	their	their	PRON	PRP$	Case=Gen|Number=Plur|Person=3|Poss=Yes|PronType=Prs	7	nmod:poss	_	_
6	own	own	ADJ	JJ	Degree=Pos	7	amod	_	_
7	food	food	NOUN	NN	Number=Sing	4	obj	_	_
8	out	out	ADP	IN	_	10	case	_	_
9	of	of	ADP	IN	_	10	case	_	_
10	air	air	NOUN	NN	Number=Sing	4	obl	_	_
11	and	and	CCONJ	CC	_	12	cc	_	_
12	sunlight	sunlight	NOUN	NN	Number=Sing	10	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **make** | can | Cold bodies | bodies's own food |  | air and sunlight |  |  | vn build-26.1-1 «NP.asset V NP»: agent=Asset food=Product |

### Option 3 {#o3}

<!-- .ven lang=en -->
Food freezes inside a cool body

```conllu
# sent_id = question:biology:43-platypus-and-echidna:t10:o3:1
# text = Food freezes inside a cool body
1	Food	food	NOUN	NN	Number=Sing	2	nsubj	_	_
2	freezes	freeze	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	inside	inside	ADP	IN	_	6	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
5	cool	cool	ADJ	JJ	Degree=Pos	6	amod	_	_
6	body	body	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **freeze** | present | Food |  |  | a cool body |  |  | vn other\_cos-45.4-1 «NP.patient V»: agent=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
Cool animals never move at all

```conllu
# sent_id = question:biology:43-platypus-and-echidna:t10:o4:1
# text = Cool animals never move at all
1	Cool	cool	ADJ	JJ	Degree=Pos	2	amod	_	_
2	animals	animal	NOUN	NNS	Number=Plur	4	nsubj	_	_
3	never	never	ADV	RB	PronType=Neg	4	advmod	_	_
4	move	move	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	at	at	ADP	IN	_	6	case	_	_
6	all	all	DET	DT	PronType=Tot	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **move** | present | Cool animals |  |  | all |  |  | vn roll-51.3.1 «NP V PP.trajectory»: agent=Theme at all=Trajectory |

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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 -->

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