Final answer:
Class B: Flammable liquids represent flammable liquids in fire classification.
Step-by-step explanation:
The type of class that represents flammable liquids in fire classification is Class B: Flammable liquids. Flammable liquids are substances that can easily ignite and burn when exposed to a source of ignition, such as an open flame or spark. Examples of flammable liquids include gasoline, alcohol, and certain solvents.