Riddle

Many things can create one, it can be of any shape or size, it is created for various reasons, and it can shrink or grow with time.

Choose an answer

A.Gap
B.Dent
C.Crater
D.Hole
Hint: It's a word with 4 letters, starting with "H".

Answer

Hole

Why this is the answer

All sorts of things -- digging, drilling, wear, decay -- can create a hole, and it can grow or shrink over time in any shape.

This riddle is filed under Hard/Difficult Riddles and rated Medium.