Which of the following materials should be used to stop bleeding from a minor cut?

Using alum powder or styptic powder is the most appropriate choice for stopping bleeding from a minor cut. These materials are specifically designed to help control bleeding by constricting blood vessels, which aids in clot formation. Styptic agents often contain astringents that also help to seal small wounds quickly, making them ideal for minor cuts that occur during cosmetic procedures like eyelash extensions.

Hydrogen peroxide, while commonly used for disinfection, can actually delay the healing process by damaging tissues and should not be used for stopping bleeding. Antibiotic ointments are beneficial for preventing infection after a wound has been cleaned, but they do not have properties to stop bleeding. Warm water, while useful for cleansing, does not provide any benefits in terms of controlling bleeding. Each option has its own use, but in the context of stopping bleeding, alum powder or styptic powder is the most effective and appropriate choice.