Answer:
Normative social influence
Step-by-step explanation:
The options for this question are missing. The options are:
a) prosocial behavior.
b) normative social influence.
c) informational social influence.
d) the bystander effect
In psychology, the normative social influence is a type of social influence that a group exerts in one person that causes the person to change their behavior in order to fit into that group and be accepted by it.
In this example, Devon always dressed casually, had long hair, etc. However when he had the chance to work with a prestigious law firm he radically changed his appearance, this was likely motivated because he wanted to fit into the group of the "prestigious law firm" and be accepted by his coworkers who likely dressed more formal. Therefore this is an example of normative social influence.