Closely related species often look similar but have courtship behaviors that are slightly different. One function of courtship in such species would be to . a. increase competition between the species. b. increase communication between the species. c. ensure that mating occurs between members of the same species. d. promote the evolution of new species through interbreeding.

Option C, ensure that mating occurs between members of the same species.

Explanation:

Courtship is a special form of behaviour that is performed by both  the male and female organism belonging to a common species so that fertilization is established in female organism.  

This special behaviour helps the two organism of opposite gender to identify the right mating partner for them.  

This essential to ensure that two organism belonging to the same species must mate together in order to produce fertile and viable offspring.  

Hence, option C is correct

the denominator has a very specific role.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers