Which item is considered a part of physical security measures?

Cameras are a key component of physical security measures because they are used to monitor and record activities in and around a facility. Their primary purpose is to deter unauthorized access, identify intruders, and provide security personnel with real-time data that can be used for incident investigations. In contrast, incident response plans, anti-virus software, and data encryption tools fall under different categories of security. Incident response plans are focused on handling security incidents, anti-virus software deals with protecting information systems from malware, and data encryption tools are used to secure data at rest and in transit. Therefore, the integration and functionality of cameras as a surveillance tool clearly position them within the realm of physical security measures, making them the correct choice in this context.