---
title: A groyne, a low wooden wall across a beach, traps sand on one side o… — Coasts and caves · tree and pragmatics
description: A groyne, a low wooden wall across a beach, traps sand on one side only. Why? Test 4 of lesson 55 «Coasts and caves» of the geography 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 4 · Coasts and caves

<!-- .ven lang=en -->
A groyne, a low wooden wall across a beach, traps sand on one side only. Why?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** groyne · **What happens:** trap · **To what, where:** sand, one side

<!-- .vabout -->
This is test 4 of lesson 55 «Coasts and caves» of the geography 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/geography/55-coasts-and-caves/#t4).

## The question {#question}

<!-- .note -->
*Sentence 1:* A groyne, a low wooden wall across a beach, traps sand on one side only.

```conllu
# sent_id = question:geography:55-coasts-and-caves:t4:1
# text = A groyne, a low wooden wall across a beach, traps sand on one side only.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	groyne	groyne	NOUN	NN	Number=Sing	12	nsubj	_	SpaceAfter=No
3	,	,	PUNCT	,	_	7	punct	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
5	low	low	ADJ	JJ	Degree=Pos	7	amod	_	_
6	wooden	wooden	ADJ	JJ	Degree=Pos	7	amod	_	_
7	wall	wall	NOUN	NN	Number=Sing	2	nmod	_	_
8	across	across	ADP	IN	_	10	case	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	10	det	_	_
10	beach	beach	NOUN	NN	Number=Sing	7	nmod	_	SpaceAfter=No
11	,	,	PUNCT	,	_	2	punct	_	_
12	traps	trap	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
13	sand	sand	NOUN	NN	Number=Sing	12	obj	_	_
14	on	on	ADP	IN	_	16	case	_	_
15	one	one	NUM	CD	NumForm=Word|NumType=Card	16	nummod	_	_
16	side	side	NOUN	NN	Number=Sing	12	obl	_	_
17	only	only	ADV	RB	_	16	advmod	_	SpaceAfter=No
18	.	.	PUNCT	.	_	12	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **trap** | present | a groyne  a low wooden wall across a beach | sand |  | one side |  |  | vn pocket-9.10 «NP V NP PP.destination»: agent=Agent sand=Theme on side=Destination |

<!-- .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.

<!-- .note -->
*Sentence 2:* Why?

```conllu
# sent_id = question:geography:55-coasts-and-caves:t4:2
# text = Why?
1	Why	why	ADV	WRB	PronType=Int	0	root	_	SpaceAfter=No
2	?	?	PUNCT	.	_	1	punct	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Longshore drift moves sand along the beach and the wall stops it

```conllu
# sent_id = question:geography:55-coasts-and-caves:t4:o1:1
# text = Longshore drift moves sand along the beach and the wall stops it
1	Longshore	longshore	ADJ	JJ	Degree=Pos	2	amod	_	_
2	drift	drift	NOUN	NN	Number=Sing	3	nsubj	_	_
3	moves	move	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	sand	sand	NOUN	NN	Number=Sing	3	obj	_	_
5	along	along	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	beach	beach	NOUN	NN	Number=Sing	3	obl	_	_
8	and	and	CCONJ	CC	_	11	cc	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	10	det	_	_
10	wall	wall	NOUN	NN	Number=Sing	11	nsubj	_	_
11	stops	stop	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	conj	_	_
12	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	11	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **move** | present | Longshore drift | sand |  | the beach |  |  | vn roll-51.3.1 «NP V NP PP.trajectory»: agent=Agent sand=Theme along beach=Trajectory |
| 2 | **stop** | present | the wall | sand |  |  |  |  | vn stop-55.4-1-1 «NP V NP.eventuality»: agent=Subeventuality it=Eventuality |

### Option 2 {#o2}

<!-- .ven lang=en -->
The tide pushes sand inland only

```conllu
# sent_id = question:geography:55-coasts-and-caves:t4:o2:1
# text = The tide pushes sand inland only
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	tide	tide	NOUN	NN	Number=Sing	3	nsubj	_	_
3	pushes	push	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	sand	sand	NOUN	NN	Number=Sing	3	obj	_	_
5	inland	inland	ADV	RB	_	3	advmod	_	_
6	only	only	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **push** | present | the tide | sand |  |  |  | inland *property* | vn carry-11.4-1-1 «NP V NP»: agent=Agent sand=Theme |

### Option 3 {#o3}

<!-- .ven lang=en -->
The wall attracts sand like a magnet, but only on the side facing the sea

<!-- fold The tree, 15 words -->
```conllu
# sent_id = question:geography:55-coasts-and-caves:t4:o3:1
# text = The wall attracts sand like a magnet, but only on the side facing the sea
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	wall	wall	NOUN	NN	Number=Sing	3	nsubj	_	_
3	attracts	attract	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	sand	sand	NOUN	NN	Number=Sing	3	obj	_	_
5	like	like	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	magnet	magnet	NOUN	NN	Number=Sing	3	obl	_	SpaceAfter=No
8	,	,	PUNCT	,	_	13	punct	_	_
9	but	but	CCONJ	CC	_	13	cc	_	_
10	only	only	ADV	RB	_	13	advmod	_	_
11	on	on	ADP	IN	_	13	case	_	_
12	the	the	DET	DT	Definite=Def|PronType=Art	13	det	_	_
13	side	side	NOUN	NN	Number=Sing	3	obl	_	_
14	facing	face	VERB	VBG	VerbForm=Ger	13	acl	_	_
15	the	the	DET	DT	Definite=Def|PronType=Art	16	det	_	_
16	sea	sea	NOUN	NN	Number=Sing	14	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **attract** | present | the wall | sand |  | the side |  | like a magnet | vn lure-59.3 «NP V NP»: agent=Agent sand=Patient |
| 2 | **face** | gerund | the side *not said here* | the sea |  |  |  |  | vn fill-9.8-1 «NP V NP»: agent=Theme sea=Destination |

### Option 4 {#o4}

<!-- .ven lang=en -->
Sand only lands on the sunny side

```conllu
# sent_id = question:geography:55-coasts-and-caves:t4:o4:1
# text = Sand only lands on the sunny side
1	Sand	sand	NOUN	NN	Number=Sing	3	nsubj	_	_
2	only	only	ADV	RB	_	3	advmod	_	_
3	lands	land	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	on	on	ADP	IN	_	7	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
6	sunny	sunny	ADJ	JJ	Degree=Pos	7	amod	_	_
7	side	side	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **land** | present | Sand |  |  | the sunny side |  |  | vn pocket-9.10-1 «NP V PP.destination»: agent=Theme on side=Destination |

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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: [Coasts and caves, test 3](https://md.mova.elamur.ai/free/en/corpora/questions/geography/55-coasts-and-caves/t3/)
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