Final answer:
Typical adolescents like Erin will have 4 to 6 close friends with whom they can share personal activities and time.
Step-by-step explanation:
If Erin is a typical adolescent, she will have 4 to 6 close friends. This range is supported by the observation that adolescents typically spend much of their time with peers and often develop intimate relationships within small groups rather than large networks. Although the use of social media might portray a higher number of friends, close friendships where adolescents engage in more personal, shared activities, like volunteering or playing sports, tend to be with a handful of people they trust and feel close to. It is important to note that while some teens might have more than 500 friends on social media platforms, these do not necessarily represent close friendships, but rather, acquaintances or less significant connections.