Final answer:
The use of LSD to get high falls under the category of illegal recreational use because LSD is an illegal psychoactive drug in many places, and it is used for its mood-altering effects.
Step-by-step explanation:
Taking LSD to get high is an example of illegal recreational use. As a psychoactive drug, LSD is considered illegal in many jurisdictions and is used for its mood and perception-altering effects. Recreational uses are typically to achieve a state of euphoria or a "high." However, LSD is listed as a Schedule I substance under the Controlled Substances Act in the United States, which means it's illegal for all uses, including recreational and medical.