Which of the following excerpts best supports the claim that the author believes that nature itself is an intelligent force? abc or d

a. but he had early discovered that one wall of his world was different from the rest. this was the mouth of the cave and the source of light.

b. later on, when each developed individuality and became personally conscious of impulsions and desires, the attraction of the light increased.

c. their little puppet-bodies crawled blindly and chemically, like the tendrils of a vine.

d. the life of his body… had yearned toward this light and urged his body toward it in the same way that the cunning chemistry of a plant urges it toward the sun.