Natural selection

Natural selection is the name given by Darwin to the survival of certain plants and animals that are fitted, and the decease contemporaneously of certain others that are not fitted, to a new environment.

It is a process which favors one feature of organisms in a population over another feature found in the population. This occurs through differential reproduction—those with the favored feature produce more offspring than those with the other feature, such that they become a greater percentage of the population in the next generation.