Question

what do u mean by echo? ​

Answer 1

Explanation:

A repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface. a sound heard again near its source after being reflected.

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Answer 2

$<p style="color:cyan;font-family:cursive;background :black;font-size:25px;">a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface. a sound heard again near its source after being reflected..</p>$