---
title: Why might a climber on Everest carry oxygen bottles? — Mountains: life as you climb higher · tree and pragmatics
description: Why might a climber on Everest carry oxygen bottles? Test 9 · ★★ of lesson 13 «Mountains: life as you climb higher» 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 9 · ★★ · Mountains: life as you climb higher

<!-- .ven lang=en -->
Why might a climber on Everest carry oxygen bottles?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** climber · **What happens:** carry · **To what, where:** oxygen bottles

<!-- .vabout -->
This is test 9 · ★★ of lesson 13 «Mountains: life as you climb higher» 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/13-mountains-life-as-you-climb/#t9).

## The question {#question}

```conllu
# sent_id = question:biology:13-mountains-life-as-you-climb:t9:1
# text = Why might a climber on Everest carry oxygen bottles?
1	Why	why	ADV	WRB	PronType=Int	7	advmod	_	_
2	might	might	AUX	MD	VerbForm=Fin	7	aux	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	_	_
4	climber	climber	NOUN	NN	Number=Sing	7	nsubj	_	_
5	on	on	ADP	IN	_	6	case	_	_
6	Everest	Everest	PROPN	NNP	Number=Sing	4	nmod	_	_
7	carry	carry	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
8	oxygen	oxygen	NOUN	NN	Number=Sing	9	compound	_	_
9	bottles	bottle	NOUN	NNS	Number=Plur	7	obj	_	SpaceAfter=No
10	?	?	PUNCT	.	_	7	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **carry** | might | a climber on Everest | oxygen bottles |  |  |  |  | vn carry-11.4 «NP V NP»: agent=Agent bottle=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 -->
Each breath there has only about a third of the oxygen at sea level

```conllu
# sent_id = question:biology:13-mountains-life-as-you-climb:t9:o1:1
# text = Each breath there has only about a third of the oxygen at sea level
1	Each	each	DET	DT	PronType=Tot	2	det	_	_
2	breath	breath	NOUN	NN	Number=Sing	4	nsubj	_	_
3	there	there	ADV	RB	PronType=Dem	2	advmod	_	_
4	has	have	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
5	only	only	ADV	RB	_	8	advmod	_	_
6	about	about	ADV	RB	_	8	advmod	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
8	third	third	NOUN	NN	Number=Sing	4	obj	_	_
9	of	of	ADP	IN	_	11	case	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	oxygen	oxygen	NOUN	NN	Number=Sing	8	nmod	_	_
12	at	at	ADP	IN	_	14	case	_	_
13	sea	sea	NOUN	NN	Number=Sing	14	compound	_	_
14	level	level	NOUN	NN	Number=Sing	11	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **have** | present | each breath | a third of the oxygen at sea level |  |  |  |  | vn birth-28.2-1 «NP V NP»: agent=Agent third=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
Oxygen bottles keep them warm

```conllu
# sent_id = question:biology:13-mountains-life-as-you-climb:t9:o2:1
# text = Oxygen bottles keep them warm
1	Oxygen	oxygen	NOUN	NN	Number=Sing	2	compound	_	_
2	bottles	bottle	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	keep	keep	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	3	obj	_	_
5	warm	warm	ADJ	JJ	Degree=Pos	3	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **keep** | present | Oxygen bottles | them *= they* |  |  |  | warm *property* | vn keep-15.2 «NP V NP»: agent=Agent they=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
The bottles help them float up the slope

```conllu
# sent_id = question:biology:13-mountains-life-as-you-climb:t9:o3:1
# text = The bottles help them float up the slope
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	bottles	bottle	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	help	help	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	them	they	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs	3	obj	_	_
5	float	float	VERB	VB	VerbForm=Inf	3	xcomp	_	_
6	up	up	ADP	RP	_	5	compound:prt	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	slope	slope	NOUN	NN	Number=Sing	5	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **help** | present | the bottles | them *= they* |  |  |  |  | vn help-72.1-1-1 «NP V NP S\_INF»: agent=Agent they=Beneficiary clause=Theme |
| 2 | **float up** | infinitive | them *= they* *not said here* | the slope |  |  |  |  | vn run-51.3.2-2 «NP V NP»: agent=Agent slope=Agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
There is no air at all above 5000 metres, so they could not breathe otherwise

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:biology:13-mountains-life-as-you-climb:t9:o4:1
# text = There is no air at all above 5000 metres, so they could not breathe otherwise
1	There	there	PRON	EX	PronType=Dem	2	expl	_	_
2	is	be	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	no	no	DET	DT	PronType=Neg	4	det	_	_
4	air	air	NOUN	NN	Number=Sing	2	nsubj	_	_
5	at	at	ADP	IN	_	9	case	_	_
6	all	all	DET	DT	PronType=Tot	9	det	_	_
7	above	above	ADV	RB	_	8	advmod	_	_
8	5000	5000	NUM	CD	NumForm=Digit|NumType=Card	9	nummod	_	_
9	metres	metre	NOUN	NNS	Number=Plur	2	obl	_	SpaceAfter=No
10	,	,	PUNCT	,	_	15	punct	_	_
11	so	so	ADV	RB	_	15	advmod	_	_
12	they	they	PRON	PRP	Case=Nom|Number=Plur|Person=3|PronType=Prs	15	nsubj	_	_
13	could	could	AUX	MD	VerbForm=Fin	15	aux	_	_
14	not	not	PART	RB	Polarity=Neg	15	advmod	_	_
15	breathe	breathe	VERB	VB	VerbForm=Inf	2	parataxis	_	_
16	otherwise	otherwise	ADV	RB	_	15	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **be** | present | no air |  |  | all 5000 metres; there |  |  | vn exist-47.1 «NP V PP.location»: agent=Theme at metre=Location |
| 2 | **not** **breathe** | could | metres *= metre* |  |  |  |  | otherwise *property* | vn breathe-40.1.2-1 «NP V»: agent=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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