Which example is most clearly a case of density-dependent population regulation?

Question

Quizplus · Accepted Answer

Density-dependent population regulation occurs when population growth is affected by the density of individuals in a population. The dangerous new flu strain in option B is an example of density-dependent population regulation because the transmission of the flu depends on the density of humans in a population. As more individuals are infected, the disease spreads more easily and can lead to reduced population growth or even a decline in population size. The other examples do not involve density-dependent population regulation.

Which Example Is Most Clearly a Case of Density-Dependent Population