Answer:
It provides a patching medium and helps maintain optimal fluidity of the membrane
Step-by-step explanation:
The role of cholesterol is to help maintain fluidity of the membrane in different environmental conditions. To do this, cholesterol holds the phospholipid molecules together so they don't separate too far, but also not hold them together too tightly. This is the reason for the cell membrane's selective permeability property which allows only some substances to enter and exit the cell.