Wolves marking their territory is an interspecific competition. The correct option is C.
They are competitions involving organisms of different species. Competition between organisms of the same species is termed intraspecific competition.
When wolves mark their territory, they are doing so against other species of animals that happen to be their competitors. Territorial marking is an indication of competition for space.
More on interspecific competitions can be found here: https://brainly.com/question/1638475
#SPJ1