Which of the following phases includes securing the safety of the scene?

The phase that includes securing the safety of the scene is the arrival on scene. During this phase, emergency responders must assess the environment and ensure that the scene is safe for themselves, bystanders, and the patient before any assessment or care is provided. Securing the scene involves looking for potential hazards, ensuring that emergency vehicles are positioned safely, and establishing a perimeter if necessary. This step is critical to prevent further injury and to create a safe working environment for the responders.

In contrast, dispatch primarily involves the initial communication regarding the emergency and does not involve physical presence on the scene. The on-scene assessment phase focuses on evaluating the situation and the patient's condition after the scene has been secured. Post-run activities occur after the emergency response has been concluded and typically involve documentation and reviewing the call, rather than any actions related to the immediate safety of the scene.