Final answer:
In middle childhood, relationships with peers become more complex and significant. Shared interests and activities, such as playing sports or joining clubs, influence popularity and friend choice.
Step-by-step explanation:
In middle childhood, relationships with peers become more complex and significant. Children go from playing with same-gender friends to starting to play in mixed-gender groups. They may participate in sports teams or other formal peer groups. Shared interests and activities, such as playing sports or joining clubs, influence popularity and friend choice.