The correct answer is A. Predation
Step-by-step explanation:
In biology, a limiting factor refers to a factor that limits the growth of a population preserving balance in ecosystems. Factors can be a density-dependent if they are directly related to the density of the population or independent if they are not related to the density of the population. From the options given, predation is the only density-dependent factor because this directly depends on the density of the population, for example, more animals to predate mean more predators and a decrease in the population of the prey, and, in the same way, few preys available leads to few predators.