Which of the following is a key responsibility of a security guard?

A key responsibility of a security guard is protecting against unauthorized access. This role is fundamental to maintaining the safety and security of the premises they are assigned to. By controlling who enters and exits a facility, security guards help prevent theft, vandalism, and other criminal activities that can occur when unauthorized individuals gain access to restricted areas.

This aspect of a security guard's responsibilities often involves monitoring entry points, checking identification, and ensuring that individuals on the premises have the right to be there. It is crucial in settings such as office buildings, retail environments, and event venues, where securing the area from unwanted intrusions is necessary to safeguard both personnel and property.

While ensuring property is used for commercial activities, conducting financial transactions, and performing routine maintenance on security systems are relevant tasks in different contexts, they do not represent the primary focus and core duty of a security guard as clearly as the protection against unauthorized access does. Security personnel are primarily engaged in preventative measures to deter and respond to security threats.