natural selection

peacock females

those who are most fit will survive, reproduce, and take over an environment

the environment decides who gets selected

peacock females pick their mate according to the male's tail. the ones with the largest and brightest tails mate more often.

this is a natural selection because of the male peacock's that mate more stand out more. also it is a natural selection because they can't just make there tail large and bright.

if the less bright and smaller tailed males became mated more it would more make the larger and brighter tailed males selected out