What is defined as defensive measures used to reduce vulnerability to terrorist acts?

The definition of measures that aim to reduce vulnerability to terrorist acts is encompassed by the term antiterrorism. This concept focuses on proactive strategies designed to deter and defend against potential terrorist threats. Antiterrorism involves various practices, including increased security protocols, intelligence gathering, and public awareness initiatives to minimize risks associated with terrorist activities.

In the context of military and law enforcement operations, antiterrorism is a crucial aspect of overall security strategy, assisting personnel in understanding the importance of vigilance and preparedness in the face of potential attacks. This encompasses a wide range of activities that are intended to prevent terrorist incidents from occurring, rather than simply responding to them after they happen.

While the other options may involve elements of security and protection, they serve different functions. Counterintelligence focuses on protecting against espionage and intelligence threats, risk management involves evaluating and prioritizing risks, and physical security refers to measures taken to protect assets, facilities, and personnel from threats. However, none of these fully encapsulate the concept of reducing vulnerability specifically to terrorist acts in the same manner as antiterrorism.