Riddle

I am always hungry and will die if not fed, but whatever I touch will soon turn red. What am I?

Choose an answer

A.Sun
B.Rust
C.Blood
D.Fire
Hint: It's a word with 4 letters, starting with "F".

Answer

Fire

Why this is the answer

Combustion creates heat and light, consuming fuel as it goes.

This riddle is filed under Expert Riddles for Adults and rated Hard.