Juan is writing a paper about children who play team sports, and he has several potential research questions. Which is his best option • Do most children enjoy team sports or individual sports?

© What team sports are most popular among children?
• Why don't all children participate in team sports?
© How does playing a team sport affect a child's development?

The best option for Juan's paper would be "How does playing a team sport affect a child's development?" This research question allows for a deeper exploration into the potential benefits and drawbacks of children participating in team sports, which can provide valuable insights for parents, educators, and policymakers.