Question

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

Answer 1

If we imagine a trait to be on a continuous spectrum:

Directional selection - selection in favour of one extreme trait at the far ends of the spectrum
Disruptive selection - selection in favour of the minority trait (against the most common one)
Stabilising selection - opposite of disruptive selection
Species selection - favouring one species over another

From this, I would personally argue disruptive selection, as it moves away from the most abundant phenotype, thus creating the most variation in a population.

Hopefully that helps!

Answer 2

directional selection disruptive selection stabilizing selection species selection