Final answer:
Nikki faces the barrier of peer pressure in this situation as her friend is trying to convince her to take prescription pills.
Step-by-step explanation:
Nikki faces a barrier known as peer pressure in this situation. Peer pressure is the influence that friends or peers have on each other's behavior, often leading one to engage in activities they may not want to do or that may be harmful. In this case, Lana is trying to persuade Nikki to take prescription pills, which is unsafe and potentially dangerous.
Learn more about Recognizing barriers to making healthy choices