Which was Charles Darwin's contribution to the study of biology? O He was the first person to recognize that organisms change over time.
O He believed that organisms adapted through the inheritance of acquired traits.
He explained how traits are passed from parents to offspring.
O He proposed that natural selection is the primary mechanism of evolution.

He proposed that natural selection is the primary mechanism of evolution.

Explanation:

Lets look at this question like this:

If you have a white deer in a green forest, the wolves who prey on deer would automatically go for that white deer. The white deer is easier to locate rather one who would blend in their environment. (A brown deer) With the theory of natural selection, the survival of the fittest would make it in their environment. Passing their genetics to their offsprings.

He proposed that natural selection is the primary mechanism of evolution.

Explanation:

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

answer; /// i believe the correct answer is (reactants);