The answer is the central idea
The correct answers are 1, 3 and 4. Charles Darwin's work introduced a new focus on Realism, inspired Naturalism in art and ushered in Impressionism. Naturalistic writers and artists were inspired by the evolution theory of Charles Darwin. Naturalism was developed as a new branch of Realism. Its basic theory is that one's heredity and social environment determine one's character and influence the action of its subjects. Naturalism was a novel and stricter realism. Degas, Monet and Cezanne, three of the most important impressionist artists, were deeply influenced by the Darwinian theories.
