Final answer:
Drug habituation refers to tolerance, psychological dependence, physical dependence, and withdrawal reaction with physiological effects.
Step-by-step explanation:
Drug habituation refers to b. tolerance, psychological dependence, physical dependence, and withdrawal reaction with physiological effects. Physical dependence involves changes in normal bodily functions, and a person who has psychological dependence has an emotional need for the drug to relieve psychological distress. Tolerance is linked to physiological dependence and occurs when a person requires more drug to achieve the same effects. Tolerance can lead to increased danger and even overdose.