My favorite animal is the Arctic fox it has very small ears because with big ears very much heat is lost so the small ears cause the fox to lose less heat.
Natrual variations i think
Okay, this has to be in your own words, but I will tell you this. Natural Selection is living organisms that have adapted to the environment which surrounds them leading the the producing of offspring. Example, bugs are eaten by frogs and frogs are eaten by snakes and snakes are eaten by birds.
<span />