Final answer:
The hose of a fire extinguisher should be aimed at the base of the flame (option B) to effectively cut off the fuel and put out the fire. It's part of critical fire safety knowledge that includes handling flammable materials and using fire safety equipment.
Step-by-step explanation:
When using a fire extinguisher, the correct technique is to aim the hose at the base of the flame. This is because targeting the base helps in cutting off the fuel to the flames and extinguishing the fire more efficiently. When encountering a fire, it's also important to ensure your safety by knowing how to properly use fire safety equipment.
Such as fire extinguishers, and to remember the protocol for handling flammable chemicals and open flames in a controlled environment, like a laboratory. A fluorinated solution in some fire extinguishers is designed to spread across the burning surface and smother the fire effectively.