Riddle

I am always hungry, I must always be fed. The finger I lick will soon turn red.

Choose an answer

A.A furnace
B.A candle
C.A stove
D.Fire
Hint: It's a word with 4 letters, starting with "F".

Answer

Fire

Why this is the answer

Fire must be continuously "fed" fuel to keep burning, and touching, or "licking," it will burn your finger red.

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