Which of the following systems might a security guard monitor?

A security guard's primary responsibilities typically include monitoring and maintaining safety and security within a given environment. Among the options provided, CCTV cameras, alarms, and access control systems are integral components of security operations. These systems allow a guard to observe and respond to potential threats, maintain awareness of who is entering or exiting a facility, and receive alerts about unauthorized access or abnormal activities.

CCTV cameras provide visual monitoring, which is crucial for identifying disturbances or criminal activity. Alarms serve as immediate notifications for security breaches, fire hazards, or other emergencies, allowing guards to take swift action. Access control systems regulate who can enter specific areas, ensuring that only authorized individuals are allowed in sensitive or restricted zones. This comprehensive monitoring approach contributes significantly to the overall safety and security of the premises.

In contrast, while heating and cooling systems, inventory management systems, and marketing databases may be essential for their respective operational roles, they do not directly fall under the security guard's responsibilities. Guards are not typically tasked with overseeing environmental control systems or business management databases, as their primary focus is on ensuring a safe environment and responding to security-related incidents.