Fact 1: Staying warm has a positive impact on an animal 's survival.

Fact 2: Humans are animals too.

Given the two facts above, answer the question "whose survival does staying warm have a positive impact on?" with the following options: 
- stability
 - a fish
 - Mammal
 - h2o
 - oxygen
 - ice cubes
 - pigeons
 - humans


 

        humans 