After Darwin concluded his voyage on the Beagle, he proposed that process of natural selection was a mechanism for the?

Darwin believed that all living things were related to each other through modification of existing organisms, and he postulated that natural selection could explain what he saw as the tree of life.

Natural selection would select the best adapted variations, he proposed, and he believed that potentially infinite variations could account for life beginning as a single cell and leading to the present complexity of modern organisms. He observed that organisms produce many more offspring that could survive. He observed that there were variations in the offspring. He observed that some offspring were better adapted to survive in the environment than others.

Darwin formulated his theory of evolution on the basis of natural selection and the presumption of infinite variations in living organisms. It should be noted, however, that the assumption of infinite varieties has been seriously questioned in light of current DNA knowledge.

Process of natural selection was a mechanism for the evolutionary adaptation of species to their environments.