Why does the body need calcium and what are the symptoms of calcium deficiency?

The body needs calcium because it is very good for your body and helps support and grow your bones and makes them stronger

In addition to building bones and keeping them healthy calcium enables our blood to clot, our muscles to contract, and our heart to beat.

Afew buddies come over to your house to hang out. they notice you're struggling in school, perhaps you have to rely on to pass your class, but you can't absorb the knowledge. they could positively reinforce getting a tutor and working with you, dedicating more time to the areas of struggle and less on hanging out to better yourself.secondly, say you're the victim of bullying. you're afraid to tell an adult because of possible repercussions from the bully himself. your friends encouraging you and pushing you towards telling an adult for your safety is another example. 

Your answer is a. coordination