What does the 'P' in the acronym P.A.S.S. stand for?

In the acronym P.A.S.S., the 'P' stands for "Pull the pin." This step is essential when using a fire extinguisher as it allows the user to unlock the extinguisher and prepare it for operation. Pulling the pin is typically the first action taken, as it ensures that the extinguisher will discharge when the handle is squeezed.

Understanding this step is crucial, as failing to pull the pin would prevent the user from activating the extinguisher at all. The subsequent steps in the acronym—aiming the nozzle, squeezing the handle, and sweeping from side to side—cannot be performed until the pin is pulled. Thus, recognizing "Pull the pin" as the correct answer emphasizes the foundational action necessary for effective fire extinguishing.