In this environment there are two types of snakes and a predator which is the eagle. The snakes are a tan color while the other types are white colored.
Change in the Gene Pool
Yo where'd my favorite snakes go?
The eagle is able to see the white snakes since they're exposed from their environment so they are eaten more often and struggle to reproduce. The tan snakes are camouflaged so they reproduce more often.
The snakes that are tan colored have a higher survival rate and are more likely to reproduce that offspring to the next generation.
Survival rate of snakes with tan color rises, population of snakes with a white color decreases by a lot.