What kind of fire can be put out safely with water oil engine gasoline or paper?

Water can safely extinguish a fire involving paper, as it cools the flames and reduces the temperature below the combustion point. However, it is dangerous to use water on oil or gasoline fires, as it can spread the flames. Oil and gasoline fires require specific extinguishing agents, such as foam or dry chemical extinguishers, designed to suffocate the flames. Always prioritize safety and use appropriate methods for different fire types.