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?
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Yes, the answer is A. From the given information, it can be inferred that the blind person is using echolocation, a technique where sound waves are emitted and the reflection of those waves are used to detect objects in the surrounding environment. By making clicking noises with his tongue, the blind person can hear the sound waves bouncing off obstacles and use the information to navigate safely. This is a form of detection that relies on the reflection of sound waves. Therefore, option A is the correct answer.

I agree.