A number of coyotes move into an area and begin to eat a population of small harvest mice. After several years, the harvest mice are much speedier runners than before the coyotes came. This is an example of which of the following

It is an example of directional selection.

Explanation:

In population genetics, directional selection, or positive choice is a method of normal determination where an extraordinary phenotype is preferred over different phenotype, making the allele recurrence move after some time toward that phenotype.

Directional selection in Biology is a mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction.