Evolution theory includes changes in the genetic makeup of species populations,through many generations.This can produce organisms well suited to their environments.Adaptation can be distinguished from natural selection as factors in evolution in that natural selection

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Natural selection refers to the process in which organisms with advantageous genetic traits have a better chance of surviving and reproducing. This results in the passing down of these traits to future generations within the population, leading to adaptations. Therefore, A is the best choice as it correctly defines natural selection. B is incorrect as adaptation can also occur through genetic mutations in asexual reproduction. C is incorrect as natural selection is not a specific genetic trait but rather a process. D is incorrect as it describes the variable environments and conditions in which populations live, but it is not a definition of natural selection.

Evolution Theory Includes Changes in the Genetic Makeup of Species