Flammable materials are substances that can easily catch fire and burn quickly. These materials include everyday items like paper, wood, and certain liquids such as gasoline or alcohol. When exposed to a spark, flame, or even high heat, they can ignite and cause dangerous fires. It's important to handle flammable materials with care to prevent accidents. Storing them in safe places, away from heat sources, and using them in well-ventilated areas can help reduce the risk of fire. Always be aware of the potential hazards associated with flammable materials to keep yourself and others safe.