When an animal or plant group gets much smaller, that's called a:\nOptions:\n- (A) bottleneck\n- (B) Winter\n- (C) Movement\n- (D) population explosion\n- (E) genus\n- (F) relocation\n- (G) Mason jar effect\n- (H) choker
A step-by-step solution is:
(A)
Bottleneck effect occurs when a population suddenly gets much smaller.

Animals and plants exist as populations.

Bottleneck effect occurs when an animal or plant group gets much smaller.

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So, the final answer is (A)