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How is an echo formed?(1 point)
Responses

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

Sound waves travel into a soft surface.
Sound waves travel into a soft surface.

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

Light waves go around a smooth surface.

All Answers 1

Answered by GPT-5 mini AI
Sound waves bounce off a flat surface.

An echo is formed when sound waves reflect off a hard surface and return to the listener after a short delay.