One reason the skeletal system is important is because
a.
without the skeletal system, an individual would not have enough calcium to live
b.
the skeletal system creates the connective tissue and tendons that allow the body to move
c.
the skeletal system is solely responsible for housing the body's immune system
d.
the skeletal system is responsible for controlling functions of the entire body

d, i believe because of it's activity level

this is a really good and amazing rule as this makes the family to spend time together.

spending time with your children and parents is really really important in order to have a loving stable and affectionate family.

also the children can save their eyesight from being ruined and can use their time in studying or doing something productive for example playing some sport or playing an outdoor game like monkey in the middle.