Who is allowed to use a fire extinguisher on a fire?

The correct choice emphasizes that only properly trained persons should use a fire extinguisher on a fire. This requirement is in place to ensure that individuals who attempt to extinguish a fire have the necessary knowledge and skills to do so safely and effectively. Proper training includes understanding the types of fire extinguishers, knowing how to operate them, and being aware of the appropriate situations in which to use them. Additionally, trained individuals can assess the fire's severity and may recognize when it is safer to evacuate rather than confront the fire.

Fire extinguishers can be dangerous if misused, and improperly trained individuals may exacerbate a situation or put themselves and others in harm's way. Hence, training helps to prevent further injury or damage while ensuring a more effective response to fire emergencies.