How is an echo formed?(1 point)ResponsesSound 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.
An echo is formed when sound waves bounce off a flat surface.
An echo is formed when sound waves bounce off a flat surface and travel back to the listener. When you speak or produce a sound, it creates sound waves that travel through the air. When these sound waves encounter a flat surface, such as a wall or a cliff, they bounce back and return to your ears. This bouncing back of sound waves creates the phenomenon that we perceive as an echo. So, the correct answer is: Sound waves bounce off a flat surface.
