The biotic component of the biosphere is not constituted by (d) air.
Explanation:
Biotic components:
These are the living organisms within an ecosystem, including producers (plants), consumers (herbivores, carnivores, etc.), and decomposers (bacteria and fungi).
Air:
Air is a non-living component of the environment, considered an abiotic factor. It is composed of gases like nitrogen, oxygen, carbon dioxide, and water vapor.