Riddle

I respond only if you speak first, but no one can see me.

Choose an answer

A.A parrot
B.A radio
C.A recorder
D.An echo
Hint: It's a 2-word phrase with 6 letters, starting with "A".

Answer

An echo

Why this is the answer

Think about the literal properties of a 'an echo.'. The riddle uses metaphors to describe its physical form or function.

This riddle is filed under Expert Riddles for Adults and rated Hard.