Which of the following is a necessary step in the critical injury procedure?

Providing first aid if needed is a crucial step in the critical injury procedure because it addresses the immediate health and safety concerns of the injured person. Rendering first aid can help stabilize their condition until professional medical help arrives. This step demonstrates a commitment to the well-being of individuals involved in the incident.

While assessing witnesses, completing a safety checklist, and sending staff home may be part of a comprehensive incident management protocol, they do not take precedence over ensuring that the injured person receives necessary medical attention right away. Quick and appropriate first aid can significantly impact outcomes in critical situations, making it an essential component of the procedure.