Correct option is C
· Charles Darwin is credited with formulating the theory of evolution by natural selection. While there were ideas about evolution before him, Darwin's work in the 19th century provided a comprehensive explanation for how species change over time. While Aristotle did contemplate the idea of changing forms in nature, his ideas weren't a formal theory of evolution like Darwin's.
· Alexander Fleming is known for discovering penicillin, not evolutionary theory.
· Issac Newton's contributions were in physics and mathematics, not biology and evolution.