What is one of the four methods of controlling bleeding?

Elevation is a method of controlling bleeding because it utilizes gravity to reduce blood flow to the affected area. When a wounded area is raised above the level of the heart, it helps decrease the pressure in the blood vessels, thereby reducing the amount of blood that can escape from the injury. This technique is particularly effective for bleeding in limbs and is often used in conjunction with other methods, such as applying direct pressure to the wound.

In contrast, rubbing the wound may exacerbate bleeding by disturbing the clotting process, and applying ice directly to an open wound can cause tissue damage. Using ointments does not address the immediate need to control bleeding and is not an effective first-aid method. Therefore, elevation is a crucial part of managing bleeding effectively in a first-aid scenario.