Fertilization is the answer i believe
The failure to deliver blood to the heart due to a narrowing of arteries results in coronary heart disease. The answer is option C. Coronary heart disease is a disease when there is plaque build up in the arteries that supply oxygen to the heart. This plaque buildup is called atherosclerosis.
That sounds like chicken pox if I where you I would call the doctor
Well the hormone would be one thing. I'd say because it strengthens our heart muscles and trains our breathing pattern to be more effective. These would lead to more efficient transportation of blood and hence oxygen to our whole body including our brain. Our brain becomes more alert, and our body more energetic.