How is an echo formed?(1 point)

Question

Responses

Light waves pass through a shiny surface.
Light waves pass through a shiny surface.

Sound waves bounce off a flat surface.
Sound waves bounce off a flat surface.

Light waves go around a smooth surface.
Light waves go around a smooth surface.

Sound waves travel into a soft surface.

Answer 1

An echo is formed when sound waves bounce off a flat surface. So, the correct response is:

Sound waves bounce off a flat surface.