Answer:
Cholesterol
Step-by-step explanation:
Atherosclerosis is a disease which is caused due to the formation of plaques in the blood arteries which transport the oxygenated blood to the organs.
The atherosclerosis is one of the causes of the heart attack which reduces the flow of the blood to the heart.
The plaques are formed because of the accumulation of the calcium and one of the types of lipid molecule which floats in the blood in the form of lipoproteins called cholesterol.
Thus, Cholesterol is the correct answer.