Puzzle Sampler 16

 

This is another classic riddle which we learned long time ago and like a lot. Can you answer it?

Riddle

I give you a group of three. One is sitting down, and will never get up. The second eats as much as is given to him, yet is always hungry. The third goes away and never returns.

What is this group of three?

Answer

The group of three is stove, fire, and smoke.