Organisms capable of using CO₂ as principal carbon source are called :
Autotrophs
Heterotrophs
Parasites
Decomposers
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UPSC NDA-1 – 2023
Autotrophs are organisms that can produce their own food using light, water, carbon dioxide, or other chemicals. They are the producers in an ecosystem. They use inorganic sources, like CO₂, to synthesize organic compounds. Photosynthesis is the most common form of energy production for autotrophs, using sunlight to convert CO₂ and water into glucose. Chemosynthesis is another process used by some autotrophs, utilizing energy from chemical reactions.