Riddle

I never stop. Over me Metal will rust. I rot bodies. Without me we wouldn't move. What am I?

Choose an answer

A.Air
B.Water
C.Motion
D.Time
Hint: It's a word with 4 letters, starting with "T".

Answer

Time

Why this is the answer

This force is constantly passing, ages metal and living things, but also makes progress possible.

This riddle is filed under Time, Money, Music Riddles and rated Medium.