I wish i could help you on this one but i really really don't know<span />
Answer:vitamin Y and vitamin Z are the essential nutrients.
Explanation:
When the researcher treated the mouse cells in the absence of vitamin W and X, the cells survived but when he eventually removed vitamin Y and Z the cells died. This implies that for the cells to grow and survive Vitamin Y and Z which are the essential Vitamin needs to be present. Thanks alot. I hope it helps!
It depend cause if they behaving bad they should have a punishment so they can't do it again cause if you don't give them a punishment they just gunna keep on doing it