Answer:
Not drinking alcohol
Explanation:
Usually, drinking way to much alcohol can cause diseases,
(Cancer, etc.)
Answer:
3 HIV destroys the immune system. Leaving the body without the ability to fight off disease.
Answer:
Epidemiology
Explanation:
<u>Epidemiology</u> provided the first solid evidence that smoking caused cancer and heart disease and has continued to yield information on the health effects of this very human habit.