What is America's bigest drug epidemic?

It's good to be in positive energy balance when you're  a.  a fully grown adult in good health.    b.  trying to deal with stress.    c.  recovering from the flu.    d.  beginning an exercise program

The characteristic of stress responses that refers to the degree or extent of the behavior is a. intensity. b. frequency. c. duration. d. stress.

In which way does nicotine cause addiction? by stimulating the brain's pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety