Answer the following question given this paragraph: 

Evolution focuses on past life forms and how they turned into present life forms. The history of life on Earth demonstrates how the first cells formed, turned into simple life forms, and then became more complex plants and animals. The studies of Charles Darwin have reshaped and influenced all aspects of biology. The vast amounts of evidence of evolution demonstrates the importance of the theory of evolution by natural selection. But has this process stopped? Of course not. Evolution does continue today.


Q: What theory of evolution is charles darwin most known for?

 Choices:

- natural change

- natural variety

- immoral selection

- natural selection

A:
natural selection
