Riddle

I work very hard and never stop. When I stop, life is death. Who am I?

Choose an answer

A.Lungs
B.Brain
C.Blood
D.Your Heart. It has to work hard to pump blood to all parts of your body!
Hint: It's a 16-word phrase with 55 letters, starting with "Y".

Answer

Your Heart. It has to work hard to pump blood to all parts of your body!

Why this is the answer

The heart must continuously pump blood; if it ever stops, the body dies.

This riddle is filed under Horror & Scary Riddles and rated Easy.