Final answer:
Mia is described as being in the game stage of development according to Mead, which is a period where children understand multiple social roles and their interactions, a skill important for team sports like baseball.
Step-by-step explanation:
Mia, who is 10 years old and a pitcher on a baseball team, needs to understand not only her own role but also the roles of her teammates to be successful in her position. According to George Herbert Mead's stages of social development, Mia is in the game stage. In the game stage, children learn to comprehend multiple roles and how those roles interact, which is necessary for team sports where players have distinct responsibilities. Mia's understanding of the different positions on her baseball team exemplifies her development in this stage, as she must be aware of how her role as a pitcher interacts with the roles of her teammates for the team to function effectively.
Sports are often regarded as a form of performance where team members have specific roles, much like actors in a play. For young people, participation in sports can offer a means for developing teamwork skills, understanding the importance of cooperation and strategy, and fostering a sense of identity within a group setting.