Answer:
directional selection
Explanation:
Directional selection: In population genetics, the term "directional selection" is also referred as "positive selection" and is described as a method of "natural selection" that encompasses a particular phenotype is being favored or dominated over any other types of phenotypes and leads the "allele frequency" to get molded with respect to time in the given phenotype's direction.
In the question above, the given statement signifies the "directional selection".
