B. The observers up front were asked to sit down so that the ones in the back could see. When you are talking about people, you use sit, not set.
do you have any other forms of information to specify your question?
Answer:
Why is social development important during adolescence?
As adolescents strive for more independence and autonomy during this time, different aspects of parenting become more salient. For example, parents' distal supervision and monitoring become more important as adolescents spend more time away from parents and in the presence of peers.
What are some ways in which social development can positively or negatively affect a teenager?
Adolescent development is characterized by biological, cognitive, and social changes. Social changes are particularly notable as adolescents become more autonomous from their parents, spend more time with peers, and begin exploring romantic relationships and sexuality.
There is evidence that problems with peer relationships, peer rejection, bullying, and loneliness are risk factors for the development of affective conditions such as depression in adolescence.