Fact 1: If a living thing becomes too cold then that living thing will die.

Fact 2: And without adequate calories, the birds die from the cold.

Given the two facts above, answer the question "What will a bird die without?" with the following options: 
- life
 - Light
 - energy
 - fats
 - water
 - Limbs
 - oxygen
 - food


 

        food 