Which of the following is NOT a responsibility of a security guard?

The responsibility of a security guard primarily revolves around maintaining safety and security for people and property within their designated area. Responsibilities like monitoring access control, conducting regular patrols, and reporting suspicious activities are essential functions that security guards are expected to perform.

Monitoring access control involves managing entry points to a facility, ensuring that unauthorized individuals do not gain access and that individuals entering have legitimate reasons for doing so. Conducting regular patrols is crucial for deterring crime and ensuring that all areas are secure and safe. Reporting suspicious activities allows security personnel to alert law enforcement and prevent potential incidents before they escalate.

Performing arrests without authority, however, is not a responsibility of a security guard. In most jurisdictions, security guards do not have the legal authority to make arrests as this power is typically reserved for law enforcement officers. Any attempt by a security guard to perform arrests could lead to legal complications and issues regarding liability and proper conduct. Thus, this option represents an action outside the expected scope of a security guard's duties.