Biology

The correct answer is: A.Bottleneck effect.

Explanation:

The Bottleneck effect occurs when a population's size is drastically reduced due to a catastrophic event, such as a natural disaster (e.g., a meteor strike, hurricane, or volcanic eruption). This reduction in population size leads to a loss of genetic diversity, as only a small, random subset of individuals survives and contributes to the gene pool of the future population.

The other options are not relevant in this scenario:

Click "Show Answer" to reveal the answer and analysis