Question

which theory suggests that speciation happens very slowly over time through the accumulation of many small changes?
specialism
naturalism
humanism
gradualism

Explanation:

Gradualism is a theory in evolutionary biology. It posits that speciation occurs slowly over time. This is in contrast to punctuated equilibrium. In gradualism, small genetic and phenotypic changes accumulate over long periods. These small changes lead to the formation of new species. Specialism refers to a focus on a particular area. Naturalism is a philosophical approach. Humanism emphasizes human values. But only gradualism fits the description of speciation through slow accumulation of small changes.

Answer:

Gradualism