화 (Fire) is a natural phenomenon that produces heat and light through combustion. It occurs when a material, typically containing carbon, reacts with oxygen in the presence of heat. Fire is essential for various human activities, including cooking, heating, and generating energy. In nature, fire plays a crucial role in ecosystems, helping to recycle nutrients and promote new growth. Certain plants, like sequoias, rely on fire for seed germination. However, uncontrolled fire can lead to wildfires, which can devastate landscapes and threaten wildlife, making fire management an important aspect of environmental conservation.