Answer:
The best definition for drug addiction is B. a persistent and compulsive need for an activity, a behavior, or a chemical substance despite unwanted consequences
Explanation:
Compulsive drug usage despite unfavorable effects characterizes drug addiction, a complicated condition. It is characterized by a strong desire to take the substance, trouble stopping, and persistent usage despite negative effects. Drug addiction may also involve misusing substances that were obtained lawfully, such as prescription pharmaceuticals. It is not just about using drugs illegally. Drug abuse can result in a variety of health and social issues, including physical and psychological dependency.