Drug dependence is characterized by-
**Core Concept**
Drug dependence, also known as substance dependence, is a complex condition characterized by the compulsive use of a substance despite its negative consequences. It involves a combination of psychological, social, and physiological factors that lead to impaired control over substance use.
**Why the Correct Answer is Right**
The correct answer involves the concept of tolerance, withdrawal, and the inability to control substance use. Tolerance occurs when the body adapts to the constant presence of a substance, requiring increasing doses to achieve the same effect. Withdrawal symptoms occur when the substance is suddenly stopped or reduced, leading to a range of physical and emotional symptoms. The inability to control substance use is a key feature of drug dependence, as individuals struggle to reduce or stop their substance use despite negative consequences.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe the key features of drug dependence. While craving is a symptom of drug dependence, it is not the defining characteristic.
**Option B:** This option is incorrect as it only mentions one aspect of drug dependence, withdrawal, without addressing tolerance and the inability to control substance use.
**Option C:** This option is incorrect as it describes a symptom of drug dependence, but not the defining characteristic. While impaired control is a key feature, it is not the only aspect.
**Clinical Pearl / High-Yield Fact**
A key feature of drug dependence is the development of a negative emotional state when the substance is not available, often referred to as a "craving." This emotional state can lead to impaired judgment and increased risk of relapse.
**Correct Answer: D. Tolerance, withdrawal, and inability to control substance use.**