Final answer:
A forensic hospital is an example of a total institution, which is the most restrictive environment for treatment.
Step-by-step explanation:
A total institution is a place where individuals are isolated from society and forced to adhere to strict rules. It is the most restrictive environment for treatment. Examples of total institutions include prisons, religious convents, and some cult organizations. In this case, the forensic hospital would necessitate the most restrictive environment as it is specifically designed to treat individuals with mental health issues who have engaged in criminal behavior.