A mechanism of evolution that suggests changes in the gene pool of a population are due to chance is

genetie di

natural selecting

gene flow

evolution

Genetic drift

Explanation:

Genetic drift is the change in the frequency in which an allele occurs in a population due to random sampling meaning the alleles in the offspring in a population are a random sample of those in the parents. Genetic drift being an evolutionary process leads to changes in the gene pool of a population over time.