Which Observation was Most Influential to Charles Darwin

Question

Which observation was most influential to Charles Darwin?
A) the wide variety of living things in South America
B) the difference between organisms of South America and organisms of Europe
C) the similarity between organisms of South America and organisms of Europe
D) the slight differences between organisms on nearby islands

Accepted Answer

The observation of slight differences between organisms on nearby islands, later known as the Galapagos Islands, was the most influential to Charles Darwin. These differences in traits among the same or similar species led him to develop his theory of evolution through natural selection.