Riddle

Man walks over, and man swims under. In times of war, it can be burned asunder. What is it?

Choose an answer

A.A tunnel
B.A dam
C.A pier
D.A bridge
Hint: It's a 2-word phrase with 7 letters, starting with "A".

Answer

A bridge

Why this is the answer

People walk across a bridge while boats or swimmers pass beneath it, and bridges have historically been burned or destroyed to block advancing armies.

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