The graph shows two types of population growth curve. A is exponential and B is logistic. Which one of the following growth models is considered more realistic?

The growth of animals in a population depends on the available resources in the environment. This model applies to populations that depend on density-dependent factors like food abundance, resting place, sickness, competition, etc. It says that the growth of the population depends on environmental factors. In contrast, the exponential growth model does not consider the environmental limits; it assumes a population can grow without limits. So, the logistic growth curve is more realistic. Hence, the correct option is B.