You are presented with the question "a developing rattlesnake requires what to survive" and the following answer choices: 
- warmth
 - companionship
 - nutrients
 - shade
 - desert
 - food
 - energy
 - air

Now knowing that an egg requires warmth to survive and inside the egg, the developing rattlesnake is nourished by the yolk of the egg, choose the best answer.


 

 warmth        