Final answer:
A behavioral health unit or contained environment is used in a psychiatric hospital or mental health facility to sedate a violent person for safety reasons.
Step-by-step explanation:
When a person is contained in an environment and is sedated by healthcare providers to manage violent behavior, it is called behavioral health unit or contained environment. This is commonly used in psychiatric hospitals or mental health facilities to ensure the safety of both the individual and others around them. For instance, in a psychiatric hospital, a violent patient might be placed in a secluded area and provided with medication to calm them down.