A phrase to describe a negative feedback loop could be: self-regulating (though I'm not sure the exact word you're looking for).
Answer:
A or C but i think c
Explanation:
Plaque builds up in the artery and makes it hard for blood to flow through, causing less and less blood to flow to the heart, as well as blood clots. The heart muscles become deprived of oxygen.
pretty sure it's true.
