The biosphere is the world of living organisms together with soil layers (land or lithosphere), water (hydrosphere) and air (atmosphere) on the earth surface. Hence, it consists of 4 parts as land, water, air and living organisms.
- Consumers are one of the type of biotic component, which consume food prepared by producers. E.g., Human being, animals.
- Decomposers are one of the type of biotic component, which derive their food material from dead, decaying matter. E.g. Bacteria, fungi.