provide food directly to all organisms – Discussion Forum

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Piyush365

Asked: October 15, 2026In: Class 9 Science

Choose the most appropriate option to describe the role of biogeochemical cycles in an ecosystem. (i) To provide food directly to all organisms. (ii) To recycle essential nutrients between biotic and abiotic components. (iii) To create new elements for use by living things. (iv) To remove pollutants and toxins from the organism.

The correct option is (ii). Biogeochemical cycles continuously circulate and replenish essential elements like carbon, nitrogen and oxygen between living organisms and physical environments, maintaining ecosystem balance and life sustainability. Class 9 Science Chapter 13 Earth as a System: Energy, Matter ...