Which of the following is a primary treatment for uncontrolled hemorrhage?

Cauterization is considered a primary treatment for uncontrolled hemorrhage because it directly addresses the source of the bleeding by sealing blood vessels or tissues to stop the loss of blood. This technique is especially effective in situations where the bleeding is due to a small or medium-sized vessel that can be effectively treated through thermal or chemical means. By applying heat or chemicals, the tissue is coagulated, reducing blood flow and facilitating hemostasis.

In contrast, fluid restriction would not be an appropriate response to uncontrolled hemorrhage, as it could worsen the hypovolemia and shock that often accompany significant blood loss. Elevating a limb may be useful in certain scenarios to help control bleeding, but it does not provide a direct method for stopping the hemorrhage—particularly if the source of the bleed is not impacted by gravitational elevation. Antibiotics are important in managing infection but do not control hemorrhage, making them irrelevant in immediate treatment of blood loss. Therefore, cauterization stands out as a direct and effective intervention for uncontrolled hemorrhagic situations.