A fire is a chemical reaction that releases heat and light. It is characterized by:
- Fuel: A fuel source such as wood, paper, or gasoline.
- Oxygen: Needed to sustain the fire.
- Heat: Can cause damage and injuries.
- Light: Illuminates dark areas.
- Smoke: Harmful to health and air quality.
- Flames: Visible tongues of fire.
- Sparks: Small burning pieces carried by wind.
- Ash: Residue left after burning.