Question

A wall built across a river.

Answer 1

Answer:

Dam

is the correct answer.

Explanation:

A dam is a wall built across a river to stop the flow of the water and make a lake. Before the dam was built, the river used to flood.

Hope this answer helps you!

Answer 2

Explanation:

A dam is a wall that is built across a river in order to stop the water flowing and to make a lake.

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