Answer:
toxic people exist to make our lives terrible and remind us of who our real friends are
Explanation:
They also exist to help us to not feel as bad when we're mean to them
Cholesterol (especially LDL*) tend to get into macrophages which migrate into blood vessels. Macrophages with cholesterol cannot get out of the vessels and stay there which causes a lipid mass in arteries. That causes atherosclerosis.