Question

current attempt in progress
mescaline is to the peyote cactus as psilocybin is to ______.
mushrooms
ergot
mold rye
the opium poppy

Explanation:

Mescaline is a psychoactive compound found in the peyote cactus. Psilocybin is a psychoactive compound found in certain mushrooms.

Answer:

A. mushrooms