Question

A blind person walks the neighborhood making loud clicking noises with his tongue. He doesn't use a walking stick nor does he have a seeing-eye-dog. However, he avoids every obstacle and is able to navigate his way around the neighborhood safely. What can be inferred from the given information?
A. He is detecting the reflection of sound waves.
B. He is detecting the refraction of sound eaves.
C. He is detecting the absorption of sound waves.
D. He is detecting the diffraction of sound waves.
Is the answer A?
Thank you

Answer 1

I agree.

Answer 2

Thank you

Answer 3

You are welcome.