Which of these is not a kind of selection?

In the context of evolutionary biology, directional, disruptive, and stabilizing selections are all recognized types of natural selection that explain how species adapt and evolve over time.

Directional selection occurs when individuals with a certain trait have a reproductive advantage, leading to a shift in the population's traits over time in one direction. For instance, if larger size is advantageous for survival, individuals with that trait may reproduce more successfully, gradually increasing the frequency of larger individuals in the population.

Disruptive selection, on the other hand, favors individuals at both extremes of a trait spectrum, rather than those with intermediate traits. For example, in a population of birds, those with either very small or very large beaks may be more successful in different environments compared to those with medium-sized beaks, leading to a split in the traits within the population.

Stabilizing selection reduces variation in a trait and favors the average or intermediate phenotypes. For example, in human birth weights, infants of very low or very high weights have higher mortality rates, making the average weight more advantageous over generations.

In contrast, stochastic processes refer to random events that can affect population dynamics, not a form of selection implementing a consistent direction or preference in trait evolution. Stochastic events can lead to random