The health triangle is the measure of our body's efficiency and overall well being. The triangle is made up of social wellness, physical wellness and Mental/Emotional wellness. Each of the sides are equal in importance. The mental/emotional wellness is a key factor in accepting yourself and liking who you are and helps you express emotions. If the mental/emotional side of the triangle was unbalanced, one might experience depression and anxiety due to not being able to express their feelings as well as not being able to process stress.
C. Peer pressure can sometimes be healthy and not always bad.
Well you attain Emotional Maturity when your full-grown emotionally.
I am pretty sure it would be Swimming Laps