The varicella vaccine is routinely given to children to prevent a disease called chickenpox. This vaccine is an example of therapeutic use.
diagnostic use.
prophylaxis.
pharmacology.

Prophylaxis

This is any action taken to prevent the spread of a disease, usually a specific one.

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.

Ibelieve the answer is c) our brain jumps to conclusions based on past experience