Final answer:
Using a fire extinguisher correctly involves aiming at the base of the flame, not the upper parts, to effectively put out the fire.
Step-by-step explanation:
When using a fire extinguisher, the correct method is to aim at the base of the flame, not the upper parts. This is because the fuel that is feeding the fire is usually located at the bottom. By extinguishing the source of the fuel, you are more likely to put out the fire effectively. So, the statement is false; when using a fire extinguisher, you should not aim at the upper parts of the flame.