The components of natural selection are: (A) adaptation to the environment; (B) variation in reproductive success.
Natural selection is defined as the phenomenon in which the organisms that are better adapted to their surroundings and are fit are naturally selected to survive and reproduce further. Fitness can be considered as the reproductive fitness where the individuals are able to produce young ones.
Reproductive success is the ability of an individual to produce young ones in the surroundings they live even when the situation is not favorable. Reproductive success makes the individuals to be selected for their survival by the environment.
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