Select the correct order to follow when using a fire extinguisher.

The correct order for using a fire extinguisher is to first pull the pin to unlock the device. This step is essential as it ensures that the extinguisher can be activated. Next, aiming the nozzle at the base of the fire is critical, as this is where the flames are feeding, and extinguishing the fire at its source is most effective. After aiming, the user should squeeze the handle or lever to release the extinguishing agent. Finally, sweeping the nozzle side to side helps cover the area of the fire thoroughly, ensuring that it is fully extinguished. This sequence—pulling the pin, aiming, squeezing the handle, and sweeping—is a widely recognized method that helps promote safety and effectiveness in using a fire extinguisher. Properly following this order maximizes the likelihood of successfully putting out the fire and minimizing the risk of injury.