$A$ food chain is a series of populations that starts with producers. It is concerned with:

  • A
    Biotic components only
  • B
    Energy flow and transfer of nutrients
  • C
    Both $(a)$ and $(b)$
  • D
    Abiotic components and decomposers

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Reason $R$: During any transformation of energy,some amount of energy is lost in the form of heat.
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