What should be emphasized regarding the response to mass casualty incidents?

The correct choice emphasizes that mass casualty incidents can arise from both natural and man-made sources. This is crucial for understanding the breadth of potential threats that emergency responders must prepare for. Natural sources could include events like earthquakes, hurricanes, or floods that lead to numerous casualties, while man-made sources may encompass incidents such as terrorist attacks, industrial accidents, or mass shootings. Recognizing the diverse origins of such incidents allows planners and responders to develop comprehensive strategies that address various scenarios.

In the context of disaster planning, it's important to have protocols and resources in place that can effectively respond to incidents regardless of their cause. This awareness leads to better training, resource allocation, and community preparedness. Emphasizing this diversity ensures that all potential risks are accounted for, enhancing overall resilience in the face of emergencies.