Fact 1: Burning wood is used to produce heat.

Fact 2: Food is cooked by the steam and heat.

Given the two facts above, answer the question "What is burning wood used for?" with the following options: 
- making trees
 - staying warm
 - engines
 - replanting trees
 - cooking food
 - removing heat
 - Electrical energy
 - warmth


 

     cooking food    