The ban on hunting animals is an example of Succession
Tropic cascade
Custodial management
Manipulative management

I think it is D

It is B. Because: Trophic cascade, an ecological phenomenon triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain, which often results in dramatic changes in ecosystem structure and nutrient cycling.

Explanation:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

a chain link fence because there so tiny even my albino donkey can't get out