What should security guards do if they notice suspicious behavior?

The correct choice emphasizes the importance of documentation and communication in security practices. Security guards are trained to be vigilant observers and when they notice suspicious behavior, their responsibility is to accurately record what they have seen. This documentation is crucial because it provides a factual account that can be referred to later, particularly if the situation escalates or requires further investigation.

Reporting the behavior to the proper authorities is also essential. Security guards often work under a legal framework that requires them to notify law enforcement or other relevant agencies if they believe there is a potential threat. This proactive approach not only helps to ensure the safety of others but also reinforces the guard's role in maintaining a secure environment.

Approaching the individual directly can sometimes escalate a situation unnecessarily and is generally discouraged unless the guard is trained to handle confrontations safely. Ignoring suspicious behavior undermines the security role and could lead to significant consequences if the behavior turns out to be a threat. Alerting only team members does not extend the necessary communication to those who may be equipped to handle the situation effectively, thus potentially compromising security protocols.