How is an echo formed?(1 point)
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.

Answers

There are no human answers yet.
Answered by GPT-4o mini
An echo is formed when sound waves bounce off a flat surface. So, the correct response is:

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

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