**Core Concept**
Direct pressure is the most effective method for controlling external hemorrhage in cases of accidental injury, as it directly compresses the bleeding vessel, reducing blood flow and ultimately stopping the bleeding. This technique is particularly useful in situations where the bleeding site is easily accessible.

**Why the Correct Answer is Right**
Direct pressure works by compressing the bleeding vessel, which reduces blood flow through the vessel and subsequently stops the bleeding. This is achieved by applying constant and firm pressure to the affected area, usually with a clean cloth or gauze. The pressure applied should be sufficient to occlude the blood vessel, but not so tight that it compromises blood flow to the surrounding tissue. In cases of severe bleeding, direct pressure should be applied for at least 5-10 minutes to ensure that the bleeding has stopped.

**Why Each Wrong Option is Incorrect**
**Option A:** Elevation is not effective in controlling external hemorrhage, as it may actually increase blood flow to the affected area, exacerbating the bleeding. Elevation is more relevant in cases of swelling or fluid accumulation, such as in the treatment of edema or fluid overload.
**Option C:** Proximal tourniquet application is not the best initial approach, as it may lead to ischemia and nerve damage in the affected limb. Tourniquets are typically used as a last resort in situations where direct pressure is not effective.
**Option D:** Aery forceps are not a standard medical tool used to control external hemorrhage. While forceps may be used in surgical procedures, they are not designed for this specific purpose.

**Clinical Pearl / High-Yield Fact**
In cases of external hemorrhage, it's essential to remember the "ABCs" of hemorrhage control: Alert the patient and others, Bleeding control through direct pressure, and Call for medical assistance if the bleeding is severe or does not stop with direct pressure.

**✓ Correct Answer: B. Direct pressure. Direct pressure is the most effective method for controlling external hemorrhage in cases of accidental injury.**