Answer:
Galapagos Islands is the correct answer.
Step-by-step explanation:
Charles Darwin was an English naturalist and biologist. He is one of the main theorists of evolution. By observing animals, Darwin developed the natural selection theory, which refers to the different phenotypes of individuals are affected by different conditions and help them survive. The Galapagos Islands played an essential role in this investigation, where Darwin found mockingbirds that shared some characteristics but they were different island to island.