Answer:
Sexual selection
Step-by-step explanation:
Sexual selection is a type of natural selection which favors the evolution of traits that increase their reproductive fitness. Mate choice is one of an example of sexual selection wherein female birds choose the mate having elaborate and conspicuous feathers. The trait is transmitted to the progeny making them reproductively fit as they will be chosen as a mate by females of their generation.
Example: Selection of peacock with colored elaborate feathers by peahen.