Question

Biotic component of biosphere is not constituted of

• A. Producers
• B. Consumers
• C. Decomposer
• D. Air

Answer 1

The correct option is D Air

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. Of which land, water and air are abiotic or non-living components and living organisms are biotic or living components.
Producers are one of the type of biotic component, which produce their own food material from simple inorganic substances like $C{O}_2$ and water in presence of sunlight. E.g., Plants.
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. Eg. Bacteria, fungi.
Hence, option A, B and C are incorrect.
Air is a abiotic or non-living type of component of biosphere. Therefore, option D is correct.