(will mark brainliest)

marcia is learning to perform a back handspring for the first time at her gymnastics class. one beginning principle necessary for a safe and successful performance of this skill is to practice the movement:

at full speed immediately to feel how your body reacts
in transition of other skills to simulate an advanced routine
on a piece of apparatus to increase jumping height
upon watching an experienced performer's proper technique

Upon watching an experienced performer’s proper technique.

This Question was a tad bit confusing

i think the answer is strength

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.