Final answer:
Cocaine is a stimulant drug that increases activity in the central nervous system and produces feelings of alertness, energy, and euphoria.
Step-by-step explanation:
A stimulant is a type of drug that increases activity in the central nervous system and produces feelings of alertness, energy, and euphoria. Among the drugs listed, cocaine is a stimulant. It affects the brain by increasing the availability of certain chemicals, such as dopamine, which regulates pleasure and movement.
Learn more about stimulant drugs