Biogeochemical cycles are natural processes that recycle essential elements and compounds through the environment. These cycles involve the movement of substances like carbon, nitrogen, and water between living organisms, the atmosphere, soil, and water bodies. For example, the carbon cycle helps regulate the amount of carbon dioxide in the atmosphere, which is crucial for photosynthesis in plants. Each cycle consists of various stages, including absorption, transformation, and release. The nitrogen cycle is another important example, where nitrogen is converted into forms usable by plants and then returned to the atmosphere. Understanding these cycles is vital for maintaining a healthy ecosystem and addressing environmental issues.