What On Earth Am I?

Author: An
7 years ago

Riddle: Many have heard me, but no one has seen me, and I will not speak back until spoken too. What am I?
Answer: An echo. Source: https://riddles.com/6428
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Many have heard me, but no one has seen me, and I will not speak back until spoken too. What am I?
What on earth am I? by An Riddle