Final answer:
Amphetamine is a stimulant drug that increases alertness, attention, and energy.
Step-by-step explanation:
A stimulant refers to a type of drug that increases alertness, attention, and energy. The drug that falls under this category is amphetamine. Amphetamines are substances that stimulate the central nervous system, increasing heart rate, blood pressure, and enhancing cognitive and physical performance. They are commonly used to treat conditions such as attention deficit hyperactivity disorder (ADHD) and narcolepsy.
Learn more about Stimulant drugs