Which of the following is the first step for controlling bleeding on an open wound?

Exposing the open wound site is crucial because it allows for a direct assessment of the wound and the extent of the bleeding. Access to the wound is necessary to determine the appropriate methods for controlling the bleeding effectively. By exposing the wound, the first responder can properly evaluate the situation, check for any foreign objects, and assess tissue damage. This step is fundamental before any further interventions, such as applying pressure or dressing the wound, as it informs the responder of the best course of action.

While assessing for fractures, applying a pressure bandage, or administering pain relief are important steps in managing a patient's overall care, they follow the initial necessity of exposing the wound. Doing so enables responders to take appropriate and effective measures to control the bleeding.