 
 <translate> Mutations are essential for evolution to occur. Natural selection is the mechanism of evolution. Mutations allow for natural selection to occur. So the final answer is (B). <ibo> Mgbanwe ndị a na-enwe n'ahụ́ ihe dị iche iche dị oké mkpa iji mee ka evolushọn nwee isi. Nhọrọ ebumpụta ụwa bụ usoro evolushọn. Mgbanwe ndị a na-eme ka e nwee ike ịhọrọ ihe ga-eme n'ọdịdị ya. N'ihi ya, azịza ya bụ (B). 