Which term best matches the description 'A physiological or psychological dependence on a drug'?

• A. Bullying
• B. Addiction
• C. Phobia
• D. Depression

Answer: (B)

Addiction is a condition where a person develops both a physiological and psychological dependence on a drug. Physiological dependence means the body adapts to the substance, leading to tolerance (needing more to feel the same effect) and withdrawal symptoms if use stops. Psychological dependence refers to a strong craving or mental need to use the drug, often tied to emotions or stress relief. Together, these aspects describe the compulsive pattern of drug use that characterizes addiction, even when the drug causes harm. The other terms describe different concepts—bullying is harassment, phobia is an irrational fear, and depression is a mood disorder—so they don’t capture the idea of dependence on a drug.