Final answer:
Cardiovascular disease and cancer are the top two leading causes of death in the United States, with heart disease claiming the most lives. Risk factors play a significant role in the prevalence of cardiovascular diseases.
Explanation:
Cardiovascular disease is the leading cause of death in the United States, followed closely by cancer. In 2009, heart disease claimed approximately 631,636 lives, accounting for 26% of all reported deaths. Risk factors for cardiovascular disease include diet, obesity, smoking, diabetes, and physical inactivity.
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