Which of the following is least likely to change the gene pool of a population of chipmunks?

A population’s gene pool changes when allele frequencies shift, such as through natural selection, migration, or mutation. Pesticide deaths may disproportionately remove certain genotypes, moving to a new habitat can change allele frequencies through migration, and mutations introduce new genetic variation. Deaths due to old age are least likely to change the gene pool because they do not inherently favor or remove particular inherited traits.

AI-written and checked against the verified answer.