Which stage involves children learning to join with others in activities according to Erikson's theory?

The correct choice reflects Erikson's stage of Industry vs. Inferiority, which typically occurs between the ages of 6 and 12. During this period, children start to develop a sense of competence and achievement in their abilities. They learn to work with others, share, and collaborate on tasks and activities, which is crucial for developing social skills and building self-esteem.

In this stage, as children engage in group activities—whether in school, sports, or play—they begin to understand the dynamics of teamwork and the importance of contribution within a community. Successful navigation of this stage fosters a feeling of industry, while failure or constant criticism can lead to feelings of inferiority. Thus, this stage emphasizes the importance of peer relationships and collaboration in a child's development and their ability to join with others effectively.