creates new alleles from DNAbrings new alleles from other populationsrandomly selects allelesfavors certain alleles A grassfire randomly sweeps through a population of buffalo and kills most of the animals.

A grassfire that kills buffalo at random can change which alleles remain in the population by chance. This is genetic drift: alleles are randomly lost or become more common, rather than being favored because they improve survival. So the fire randomly selects alleles, not creates new ones or brings them from another population.

AI-written and checked against the verified answer.