Question

which type of selection leads to increased phenotypic and genetic variation?
directional selection
disruptive selection
stabilizing selection
species selection

Explanation:

Directional selection favors one extreme phenotype, reducing variation. Stabilizing selection favors intermediate phenotypes, decreasing variation. Species selection acts on species-level traits, not individual genetic/phenotypic variation. Disruptive selection favors both extreme phenotypes over intermediates, increasing genetic and phenotypic variation in a population.

Answer:

disruptive selection