Biology

The correct answer is: B.small populations.

Explanation:

Genetic drift is more pronounced in small populations because each individual represents a larger fraction of the gene pool. In small populations, random events can lead to significant changes in allele frequencies over generations. This can result in the loss of genetic variation or the fixation of certain alleles due to chance, rather than natural selection.

In larger populations, the effects of genetic drift are less noticeable because the larger number of individuals helps to buffer against random fluctuations in allele...