Final answer:
The active chemical in psychoactive mushrooms is Psilocybin, a natural compound found in certain mushrooms used for its hallucinogenic effects.
Step-by-step explanation:
The active chemical in psychoactive mushrooms is D) Psilocybin. Psilocybin (4-phosphoryloxyN, N-dimethyltryptamine) is found in certain types of mushrooms and is known for its hallucinogenic properties. These mushrooms are often referred to as 'magic mushrooms' or 'shrooms' and can be consumed in various ways, such as raw, mixed with food, or brewed into a tea. While similar in effects to LSD, psilocybin is distinct in its chemical nature and source. Unlike LSD, which is synthesized from lysergic acid, psilocybin is naturally occurring in mushrooms. Traditional uses have included religious and ritual ceremonies among indigenous cultures in Mexico and Central America.