Question

what is echo ?
and
what is reverberation​

Answer 1

Echo is a sound or sounds caused by the reflection of sound waves from a surface back to the listener.

Reverberation is prolongation of a sound.

$<b>hope it helps$ ❣️✌️

Answer 2

Echo - A sound caused by the reflection of sound waves from a surface back to the listener.
Reverberation - prolongation of sound.

Hope it's help you...