Riddle

It rows quickly with four oars but never comes out from under his own roof. What is it?

Choose an answer

A.A crab
B.A snail
C.A frog
D.A turtle
Hint: It's a 2-word phrase with 7 letters, starting with "A".

Answer

A turtle

Why this is the answer

A turtle's four legs work like oars propelling it through water, while its shell serves as a permanent roof it never leaves.

This riddle is filed under "What Am I?" Riddles and rated Medium.