Friends who you take a leap of faith, be a positive risk-taker, or try something new are applying positive a) physical cues b) mental cues c) integration d) peer pressure

D) peer pressure

Explanation:

Peer pressure occurs when a person acts in a certain way because he or she wants to fulfill his or her friends' expectations. If a person's friends act in a certain way, it is likely they will encourage the other person to act in those ways too. Peer pressure usually has a bad connotation because it is associated with dangerous practices, such as drug use and reckless behaviour. However, there can be positive peer pressure as well, like the one in the example.

this question does't support enough resioning to answer.

answer; the sound of a train whistle makes a woman think of an old friend; //

the smell of grass makes a by feel that spring is the best; (apex);