According to sentence, the major ideas that Charles Darwin introduce in his writings include options A and B: Natural Selection and Survival of the Fittest.
Charles Darwin was an famous naturalist and biologist. He was well known for his inventions to evolutionary biology.
His scientific theory about natural selection and survival of fitness considered as the foundation of modern studies.
Through these theories, Charles wanted to learn more about the variation in physical structure due to change in genes.
Therefore, correct options are A and B.
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