When the decomposer decomposes the organic substances than they are taken by plants in the form of nutrition and minerals. Likewise, the food prepared by the plants are taken by animals and the nutrition is recycled.
The oxygen and carbon dioxide cycle is also recycled. When the animals releases carbon then the plants take it and gives out the oxygen. In this way oxygen and carbon dioxide cycle is also maintained in nature.
The biosphere is made up of all living organisms and is inextricably linked to the other three spheres: most live organisms need gases from the atmosphere, water from the hydrosphere, and nutrients and minerals from the geosphere.
