Which of the following is a correct action for using a fire extinguisher according to the PPPS pattern?

The correct action according to the PPPS pattern for using a fire extinguisher is to point the nozzle at the base of the fire. This is crucial because fires require fuel, and the base of the fire is where the combustible material is located. By directing the extinguisher at the base, you can effectively smother or cool the fuel that is actively burning, which helps to extinguish the flames.

Targeting the base rather than the flames themselves is essential, as the flames may be the result of a fire that is fed by the materials below. If the agent from the extinguisher is applied to just the flames, it may not reach the source of the fire, allowing it to continue burning or even re-ignite after the flames are dispersed.

This approach also ensures that the extinguisher's chemical agent is used most effectively, maximizing its potential to suppress the fire and providing a safer approach for the user, who may be close to a highly flammable situation. Thus, positioning the nozzle at the base is a fundamental principle in effectively using a fire extinguisher and is in alignment with established fire safety protocols.