What are examples of cycling of matter within living system?

Cycling of matter within living systems is exemplified by processes such as the carbon cycle, nitrogen cycle, and water cycle. In the carbon cycle, plants absorb carbon dioxide during photosynthesis and release oxygen, while animals consume plants and respire carbon back into the atmosphere. The nitrogen cycle involves bacteria converting atmospheric nitrogen into forms usable by plants, which are then consumed by animals, returning nitrogen to the soil through waste and decomposition. Additionally, the water cycle includes evaporation, condensation, and precipitation, which sustain life by distributing water necessary for biological processes.