Final answer:
Alcohol is considered a drug due to its psychoactive properties which can alter an individual's mood and behavior.
Step-by-step explanation:
Alcohol is defined as a drug because of its psychoactive properties. Ethanol, commonly referred to as alcohol, is classified as a depressant and is one of the many psychoactive drugs that affect the central nervous system. This category of drugs can alter mood, thinking, perception, and behavior, leading to changes such as euphoria or increased sociability, but they can also result in substance abuse and addiction. Psychoactive drugs, including alcohol, can be used recreationally, but their misuse can lead to negative consequences such as addiction or even death.