The correct answer is: A. Darwin
Charles Darwin was a naturalist who proposed the theory of evolution by natural selection. He observed that members of the same species are not alike, and that this variation is due to random mutations. These mutations can be beneficial, harmful, or neutral. Beneficial mutations are more likely to be passed on to the next generation, while harmful mutations are less likely to be passed on. Over time, this process of natural selection can lead to the evolution of new species.
Hebert Spencer was a philosopher who developed the theory of social Darwinism. Social Darwinism is the application of Darwin’s theory of evolution to human society. Spencer argued that the fittest individuals and societies are those that are best able to adapt to their environment. He believed that this process of natural selection would lead to the evolution of a better society.
Best and Good are not correct answers because they are not the names of scientists who proposed theories about evolution.