Evolution occurs through natural selection when individuals best suited to their environment are more likely to survive and pass on genes; option D
Evolution is the process by which new species of organisms are formed from existing species through gradual changes which occur in these organisms over a long period of time.
Evolution of species can occur through a process known as natural selection.
Natural selection is the process by which species which possess certain features that enable to adapt to changes in their environment survive while those that do not have these features die.
In conclusion, natural selection is one the processes by which evolution occur.
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