I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?

Q: I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?

An echo! An echo is a reflection of sound that seems to 'speak' without a mouth and 'hear' without ears. It has no physical body but comes alive when sound waves bounce off surfaces.

Hint:

You might hear me in mountains or large empty rooms...

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