Question

which step of first aid for bleeding slows the flow of blood?
removing debris
applying pressure
cleaning the wound
using a clean bandage

Explanation:

Applying pressure is a common first - aid method for bleeding. When pressure is applied to a bleeding area, it can compress the blood vessels, reducing the space for blood to flow through and thus slowing down the blood flow. Removing debris and cleaning the wound are more about preventing infection rather than directly slowing blood flow. Using a clean bandage is often done after applying pressure (in some cases, the bandage can help maintain pressure, but the key action for slowing blood flow is the application of pressure itself).

Answer:

applying pressure