The correct answer is: B. Intraspecific competition.
Intraspecific competition is a type of competition that occurs between members of the same species. It is a major factor in determining the population size of a species. When the population of a species is high, there is more competition for resources such as food, water, and shelter. This can lead to a decrease in the population size of the species.
Mutualism is a type of interaction between two species in which both species benefit. Interspecific competition is a type of interaction between two species in which both species are harmed. Predation is a type of interaction in which one species (the predator) kills and eats another species (the prey).
In the case of a high density of elephant population in an area, there will be more competition for resources such as food, water, and shelter. This can lead to a decrease in the population size of the elephants. The elephants will compete with each other for these resources, and the weaker elephants will not be able to survive. This is an example of intraspecific competition.