Risk factors? a. refers to being in good shape or physical condition b. the process and functions of the body c. social needs, social behaviors, and social problems d. traits that increase the possibility of developing an illness or disease

I am almost positive the correct answer is D.

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.