When kristen began to smoke, she used only 3-5 cigarettes a day. now, for her to feel in control during the day, she has to smoke 18 cigarettes. what is she experiencing? multiple dependencesubstance abuse?

Tolerance

Explanation:

Every chemical or inorganic substance that a person needs to take larger and larger doses to get the same initial effect is because he has developed tolerance to that substance. An example of this can be seen in the question above, where Kristen only needed to take 3-5 cigarettes a day to feel safe and in control of her life. However, this amount of cigarettes is no longer enough to promote these feelings in Kristen, because she has developed cigarette tolerance and needs to smoke more to feel peaceful and in control of her life.

answer; which categories of people are most at risk of becoming a criminals;

answer; traffic,pedestrians,parked vehicles and intersections;