Concept:Competition arises when the demand for limited resources exceeds the available supply in a habitat.
Explanation:When large numbers of organisms occupy a limited space, resources such as food, water, space, and shelter become insufficient.
Each organism needs these resources to survive and reproduce.
Because the resources cannot satisfy every individual, organisms begin to struggle against one another to obtain their share.
This struggle is called competition.
Competition may occur between members of the same species or between different species in the same habitat.
It is the immediate ecological result of overcrowding and limited resources.
Extinction and emigration could occur later, but they are not the immediate outcome of scarcity.
Immigration refers to organisms moving into an area, so it does not describe the struggle for limited resources.
Answer:C. competition