The best answer for this question would be:
biological and social
Medical anthropologist need to understand the source of their biological heritage and ofcourse the system of their bodies in order to understand their suffering. Social factor is also important, because it can tells them the source of their suffering.
Nicotine is highly addictive so i would go with something that is common in each of those
Answer: To assist your circulatory system in pumping oxygen-rich blood to your working muscles.
Explanation:
