Which of the following actions is part of monitoring premises?

Monitoring premises is a critical responsibility that involves observing the environment for any signs of irregularities or potential threats. The correct action associated with this is observing and checking for suspicious activity. This task is fundamental for ensuring the safety and security of the premises being monitored. Security personnel must remain vigilant and proactive in identifying and responding to potential threats, which directly contributes to the overall protective measures in place.

Conducting fire drills, while important for safety, falls under emergency preparedness rather than ongoing monitoring. Setting up marketing strategies is unrelated to security functions and focuses instead on business promotion and sales. Maintaining inventory stock relates to logistical and operational tasks, which are not directly involved in the security monitoring of premises. Hence, the focus on observing and checking for suspicious activity is paramount in the role of a security officer tasked with maintaining a secure environment.