---
title: Identify the principal reason for which a deciduous tooth becomes lo… — Teeth: baby teeth, grown-up teeth and… · tree and pragmatics
description: Identify the principal reason for which a deciduous tooth becomes loose prior to its loss. Exam question 2 of lesson 351 «Teeth: baby teeth, grown-up teeth and wobbly teeth» of the biology course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mo
---

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# Exam question 2 · Teeth: baby teeth, grown-up teeth and wobbly teeth

<!-- .ven lang=en -->
Identify the principal reason for which a deciduous tooth becomes loose prior to its loss.

<!-- .vintro -->
**Mova's choice:** option 3 · **The right answer:** option 3 · right ✓ · **Who acts:** you, deciduous tooth · **What happens:** identify, become · **To what, where:** principal reason

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This is exam question 2 of lesson 351 «Teeth: baby teeth, grown-up teeth and wobbly teeth» of the biology 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/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/#e2).

## The question {#question}

```conllu
# sent_id = question:biology:351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth:e2:1
# text = Identify the principal reason for which a deciduous tooth becomes loose prior to its loss.
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	reason	reason	NOUN	NN	Number=Sing	1	obj	_	_
5	for	for	ADP	IN	_	6	case	_	_
6	which	which	PRON	WDT	PronType=Rel	10	obl	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	deciduous	deciduous	ADJ	JJ	Degree=Pos	9	amod	_	_
9	tooth	tooth	NOUN	NN	Number=Sing	10	nsubj	_	_
10	becomes	become	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	acl	_	_
11	loose	loose	ADJ	JJ	Degree=Pos	10	xcomp	_	_
12	prior	prior	ADJ	JJ	Degree=Pos|ExtPos=ADP	15	case	_	_
13	to	to	ADP	IN	_	12	fixed	_	_
14	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	15	nmod:poss	_	_
15	loss	loss	NOUN	NN	Number=Sing	11	obl	_	SpaceAfter=No
16	.	.	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 reason |  |  |  |  | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent reason=Theme |
| 2 | **become** | present | a deciduous tooth |  |  |  |  | for the principal reason; loose *property* | vn become-109.1-1-1 «NP V PP.attribute»: agent=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 -->
The gum recedes in consequence of growth in stature

```conllu
# sent_id = question:biology:351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth:e2:o1:1
# text = The gum recedes in consequence of growth in stature
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	gum	gum	NOUN	NN	Number=Sing	3	nsubj	_	_
3	recedes	recede	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	5	case	_	_
5	consequence	consequence	NOUN	NN	Number=Sing	3	obl	_	_
6	of	of	ADP	IN	_	7	case	_	_
7	growth	growth	NOUN	NN	Number=Sing	5	nmod	_	_
8	in	in	ADP	IN	_	9	case	_	_
9	stature	stature	NOUN	NN	Number=Sing	7	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **recede** | present | the gum |  |  | consequence of growth in stature |  |  | vn escape-51.1-1 «NP V»: agent=Theme |

### Option 2 {#o2}

<!-- .ven lang=en -->
The tooth desiccates and is rendered lighter

```conllu
# sent_id = question:biology:351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth:e2:o2:1
# text = The tooth desiccates and is rendered lighter
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	tooth	tooth	NOUN	NN	Number=Sing	3	nsubj	_	_
3	desiccates	desiccate	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	and	and	CCONJ	CC	_	6	cc	_	_
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	aux:pass	_	_
6	rendered	render	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	conj	_	_
7	lighter	light	ADJ	JJR	Degree=Cmp	6	xcomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **desiccate** | present | the tooth |  |  |  |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 2 | **render** | present · passive | the tooth *not said here* |  |  |  |  | light *property* | vn give-13.1 «NP V PP.recipient» |

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

<!-- .ven lang=en -->
The root thereof is dissolved by the permanent tooth developing beneath it

```conllu
# sent_id = question:biology:351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth:e2:o3:1
# text = The root thereof is dissolved by the permanent tooth developing beneath it
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	root	root	NOUN	NN	Number=Sing	5	nsubj	_	_
3	thereof	thereof	ADV	RB	_	2	advmod	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux:pass	_	_
5	dissolved	dissolve	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
6	by	by	ADP	IN	_	9	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
8	permanent	permanent	ADJ	JJ	Degree=Pos	9	amod	_	_
9	tooth	tooth	NOUN	NN	Number=Sing	5	obl	_	_
10	developing	develop	VERB	VBG	VerbForm=Ger	9	acl	_	_
11	beneath	beneath	ADP	IN	_	12	case	_	_
12	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	10	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** | present · passive | the permanent tooth | the root |  |  |  |  | vn break-45.1 «NP V NP»: agent=Agent subject=Patient |
| 2 | **develop** | gerund | the permanent tooth *not said here* |  |  | root |  |  | vn appear-48.1.1 «NP V PP.location»: agent=Theme beneath it=Location |

### Option 4 {#o4}

<!-- .ven lang=en -->
The tooth is weakened by excessive consumption of sugar

```conllu
# sent_id = question:biology:351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth:e2:o4:1
# text = The tooth is weakened by excessive consumption of sugar
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	tooth	tooth	NOUN	NN	Number=Sing	4	nsubj	_	_
3	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux:pass	_	_
4	weakened	weaken	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
5	by	by	ADP	IN	_	7	case	_	_
6	excessive	excessive	ADJ	JJ	Degree=Pos	7	amod	_	_
7	consumption	consumption	NOUN	NN	Number=Sing	4	obl	_	_
8	of	of	ADP	IN	_	9	case	_	_
9	sugar	sugar	NOUN	NN	Number=Sing	7	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **weaken** | present · passive | excessive consumption of sugar | the tooth |  |  |  |  | vn other\_cos-45.4 «NP V NP.patient»: agent=Agent subject=Patient |
| 2 | **consume** |  |  | sugar |  |  |  |  | nom consumption «act transitive»: of=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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- ← previous: [Teeth: baby teeth, grown-up teeth and…, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/e1/)
- next →: [Teeth: baby teeth, grown-up teeth and…, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/e3/)
- ↑ back to [Teeth: baby teeth, grown-up teeth and wobbly teeth](https://md.mova.elamur.ai/free/en/corpora/questions/biology/351-teeth-baby-teeth-grown-up-teeth-and-wobbly-teeth/)