What is the primary duty of personnel categorized under "business of security services"?

The primary duty of personnel categorized under "business of security services" is centered around protecting persons or property. This encompasses a broad range of activities, including physical security measures, surveillance, and responding to incidents to ensure the safety and security of individuals and assets.

In the context of security services, the primary focus is on prevention and response to threats, making the protection of people and property the cornerstone of their responsibilities. This includes everything from maintaining safety in public spaces, securing private premises, and working to deter criminal activity through visible presence and vigilance.

While the other options may reflect activities that security personnel might engage in, they do not capture the primary function of the security services sector. Investigating criminal activities and conducting private investigations often fall under law enforcement or specialized investigative roles rather than the general security services. Providing witness testimony is supportive and often follows an incident rather than serving as the core duty. Therefore, the fundamental role of security personnel is unequivocally focused on preventive measures and direct protection of individuals and property.