 
 <translate> Bottleneck effect occurs when a population suddenly gets much smaller. Genetic variation can be reduced by random genetic drift, population bottlenecks, founder effect. Genetic variation can be reduced when a population suddenly gets much smaller.
So, the answer is (F). <ibo> Nsogbu a na-apụta ma ọ bụrụ na ọnụ ọgụgụ ndị bi n'otu obodo belata ngwa ngwa. Enwere ike ibelata mgbanwe mkpụrụ ndụ ihe nketa site na mbugharị mkpụrụ ndụ ihe nketa na-enweghị usoro, nsogbu ndị mmadụ, mmetụta onye guzobere. A pụrụ ibelata ọdịiche nke mkpụrụ ndụ ihe nketa mgbe ọnụ ọgụgụ ndị bi na ya na mberede belatara nke ukwuu. Azịza ya bụ (F). 