Final answer:
Children typically form friendships with peers who are similar to them and with whom they have regular contact due to proximity and shared activities.
Step-by-step explanation:
Children are most likely to form a friendship with others who are similar to them in background, attitudes, and lifestyle. This is due to the principle of homophily, which describes the tendency for people to form social networks, including friendships, marriage, and business relationships, with those who are alike. Proximity is also a crucial factor, meaning that children will more easily form friendships with those they see regularly, like classmates or neighborhood peers. From early childhood, they are socialized to understand the norms and behavioral expectations of society, which influences their selection of friends who share common interests and activities, such as participating in sports like the Little League or engaging in group activities like scouts.