## **Core Concept**
The primary goal in managing external hemorrhage is to promptly control bleeding and prevent significant blood loss. This is achieved through immediate intervention that focuses on applying pressure to the site of bleeding.

## **Why the Correct Answer is Right**
The correct approach to control external hemorrhage as a first aid measure involves applying **direct pressure** to the wound. This method is effective because it helps to compress the blood vessels at the site of injury, thereby reducing or stopping the bleeding. Direct pressure can be applied using a clean cloth or gauze, and if possible, it should be maintained continuously.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Elevation of the limb alone, while sometimes helpful, is not the most effective immediate action to control external hemorrhage. It may be used in conjunction with direct pressure but is not sufficient on its own.
- **Option B:** Application of a tourniquet is a more invasive measure and is generally considered when direct pressure is not feasible or has failed to control severe limb bleeding. Its use can lead to complications such as limb ischemia.
- **Option C:** This option is not provided, but based on common first aid practices, other methods like applying pressure points or using hemostatic agents might be considered, though they are not the initial recommended step.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is the **ABCDE** approach in trauma care, where **C** stands for Circulation and control of hemorrhage. The immediate application of direct pressure to a bleeding wound is a fundamental skill that can significantly impact patient outcomes.

## **Correct Answer:** . Direct pressure.