Question

Which form of natural selection does the graph represent?

A graph has trait value on the horizontal axis and proportion of individuals on the vertical axis. The original population increases to a maximum point at the center, and then decreases. The population after selection increases, decreases, increases, and then decreases again. The maximum of the original population is the minimum of the population after selection.
directional selection
disruptive selection
sexual selection
stabilizing selection

Answer 1

Disruptive selection.

Explanation: the original single central peak becomes a valley after selection while the extremes are favored (two peaks), which is the hallmark of disruptive selection.