Biology

The correct answer is: C.Evolutionary changes that accumulate over long periods of time.

Explanation:

Gradualism suggests that evolution occurs slowly and steadily over long periods of time, with small, incremental changes accumulating gradually to result in the development of new species. This process is consistent with the idea that evolutionary changes accumulate over time, rather than occurring suddenly.

The other options:

A.Speciation occurring suddenly after a catastrophe: This describes punctuated equilibrium, not gradualism, which proposes sudden burst...