Dependence is the most common form of chemical dependence in the united states.
a. alcohol b. tobacco c. nicotine d. marijuana i think its c.

List three reasons people may begin using tobacco

Describe the potential effects, on people, of unprotected exposure to the sun.give an example of 1 new thing have you learned about the sun’s uv rays.

Christopher came down with chicken pox after spending time in his child’s day care. the chicken pox represents what link in the chain of transmission in this scenario?