Which of the following is a priority in wilderness first aid?

In wilderness first aid, prioritizing the prevention of environmental exposure is essential because it directly impacts the patient's safety and health outcomes. The wilderness environment can present numerous risks, including extreme temperatures, moisture, insects, and other hazardous conditions. By addressing and mitigating these risks, first responders can help stabilize the patient's condition and prevent further complications, such as hypothermia, heat exhaustion, or infection.

Focusing on environmental exposure means ensuring the patient is protected from the elements, which might include finding shelter, managing moisture, and addressing the patient's temperature needs. This foundational aspect supports more advanced care and should be a primary concern before considering transport options or other interventions.