Which physical security activity would include the use of an emergency response plan?

The focus on response and recovery in the context of physical security activities encompasses the use of an emergency response plan, which is crucial for effectively managing incidents that may threaten the safety and security of a facility. An emergency response plan outlines the procedures to follow in the event of emergencies such as natural disasters, security breaches, or other critical incidents.

The response phase involves immediate actions taken to address and mitigate the effects of an emergency, ensuring the safety of personnel and minimizing damage to assets. Recovery refers to the steps taken post-incident to restore normal operations and evaluate the response process, aiming for continuous improvement in safety protocols.

This aligns with the comprehensive nature of response and recovery, as an effective emergency response plan needs to address both immediate actions (response) and long-term strategies (recovery) to ensure an organization can withstand and rebound from various threats.

In contrast, the other options do not primarily focus on the aspect of preparing for and managing emergencies. Obstacles and prevention involve measures to deter unauthorized access, surveillance and notification focus on monitoring and alerting processes, and intrusion detection relates specifically to identifying unauthorized entries or breaches. While these activities are critical components of physical security, they do not encompass the development and execution of an emergency response plan as directly