A primary function of a security guard at an event is to ____________.

Monitoring crowd behavior is a key responsibility of a security guard, especially in event settings where large groups of people gather. This function is crucial for maintaining safety and ensuring that the event runs smoothly. By observing the crowd, guards can identify potential issues, such as signs of overcrowding, disturbances, or any unsafe behaviors. This proactive approach allows them to intervene before situations escalate, thereby preventing incidents that could compromise the safety of attendees.

While performing first aid is also an important skill for security personnel, it is typically not their primary function unless an emergency arises. Managing ticket sales and transporting supplies are generally tasks that fall outside the typical security duties, as they relate more closely to event management or logistical support rather than ensuring the safety and order of the event environment. Therefore, the focus on crowd behavior aligns directly with the core mission of security personnel at an event.