Which of the following is a consequence of artificial selection on allele frequencies?

Artificial selection often leads to specific traits being favored and, as a result, these traits become more prevalent in the population over generations. This selective breeding focuses on a limited number of individuals that possess desirable characteristics, which can lead to a reduction in genetic variation within the population. By concentrating on certain alleles associated with those traits, other alleles may diminish or disappear entirely, reducing the overall genetic diversity. This narrowed genetic base can make the population more vulnerable to diseases and environmental changes because there are fewer variations for natural selection to act upon. Therefore, a significant consequence of artificial selection is indeed a reduction in genetic variation, affecting the population's adaptability and resilience.