Which is NOT a component of scene size-up?

The correct choice indicates that "Assessment of the environment" is not considered a component of scene size-up. Scene size-up is a crucial initial process in emergency response, consisting primarily of evaluating the safety of the scene, understanding the mechanism of injury or the nature of the illness being dealt with, and determining whether additional resources are required.

In this context, scene safety ensures that responders can approach without being placed in danger. Understanding the mechanism of injury or nature of illness helps responders assess the situation to provide appropriate care. Additionally, recognizing the need for more rescuers and special equipment ensures all necessary support is arranged for an effective response.

While assessing the environment plays a role in overall situational awareness, it is typically encompassed within the broader assessments of safety and resource needs rather than being distinct as a standalone component of scene size-up. Therefore, it is appropriate to conclude that “Assessment of the environment” does not fit the defined components of scene size-up in emergency response protocols.