Why do you think that sports-related injuries are more likely for kids who specialize in one sport,
rather than practice a variety of sports?

Because they don't use a variety of muscles as much as they could by doing more sports so when they use the lesser used muscles, they could get hurt.

Explanation:    

answer: our bodies are made up of mostly water, we rely on it to regulate our body funtions.

answer; i believe that the answer is home chores,companionship and personal assistance;