Question

A girl stands at a distance from a large building. She claps her hands and a short time later hears an echo. Why is an echo produced when the sound waves hit the building?
2 points
A The sound waves are absorbed.
B The sound waves are diffracted.
C The sound waves are reflected.
D The sound waves are refracted.​

Answer 1

Answer:

Option D is the correct answer

Explanation:

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Answer 2

Answer:

Option C

Explanation:

When sound hits a hard surface, it reflects back, and if it hits the surface some more times you will hear a longer echo.