The role of plaque formation in the arteries during heart disease development are the causes of heart attacks. Cholesterol plaques form through the process of "atherosclerosis" or also known as the hardening of the arteries. Plaques develop in the wall of the arteries, which results to blocked arteries, which results less blood flow or blood does not even flow through the blocked artery or arteries.
Answer:
In this scenario, the green light is a(n) <u><em>signal</em></u>.
Explanation:
In the above scenario, with time, the pigeon has learnt that he will be rewarded only when the green light is on. Such a condition is known as learned behaviour. In the future, the pigeon will only peck the button when the green light is on because he will know that he will be rewarded for pecking the button only when the green light is on. Hence, the green light is the signal for the pigeon to start pecking the button.
B- <span>occurs when organs protrude through an open wound</span>
