Final answer:
Stimulants are drugs that activate the sympathetic nervous system and produce feelings of optimism and boundless energy.
Step-by-step explanation:
The drugs that activate the sympathetic nervous system and produce feelings of optimism and boundless energy are called stimulants. Stimulants are a type of psychoactive drug that stimulate the brain, increase alertness, and wakefulness. Examples of stimulants include caffeine, nicotine, cocaine, and amphetamines.