Which of the following is a necessary treatment for a bleeding wound?

Direct pressure is a necessary treatment for a bleeding wound because it helps to control and stop the bleeding by applying firm pressure to the area. When direct pressure is applied, it compresses the blood vessels and helps to promote clot formation at the site of the injury, which is crucial in preventing excessive blood loss.

In the context of wound care, applying direct pressure is often the first step responders should take while assessing the situation and determining if further medical assistance is needed. This technique is effective for most types of bleeding, especially when it comes to arterial and venous bleeding.

Other management techniques may play a role in overall wound care, but they are not the first line of treatment for actively bleeding wounds. For instance, antibiotic ointment may be applied afterward to prevent infection, but it does not address the immediate need to control bleeding. Immobilization is important in the case of fractures or serious injuries, while performing CPR is focused on a different situation where a person's breathing or heartbeat has stopped. Therefore, direct pressure is the appropriate and necessary treatment for addressing the immediate concern of a bleeding wound.