Question

heart disease is frequently related to high levels of
endorphins platelets cholesterol estrogen

Explanation:

To determine the correct answer, we analyze each option:

• Endorphins are related to pain relief and mood, not heart disease causation.
• Platelets are involved in blood clotting, not a direct link to heart disease from high levels.
• High cholesterol levels (especially LDL cholesterol) can lead to plaque buildup in arteries, increasing the risk of heart disease.
• Estrogen is a hormone, and while its levels can affect heart health in some ways, high estrogen isn't a primary factor for heart disease like high cholesterol is.

Answer:

C. cholesterol