Fact 1: An egg requires warmth to survive.

Fact 2: Eggs depend upon body warmth to incubate.

Given the two facts above, answer the question "eggs need to incubate to what" with the following options: 
- complete
 - mitosis
 - be fertilized
 - produce nutrients
 - be eaten
 - Winter
 - survive
 - sunlight


 

       survive  