Plants absorb atmospheric carbon dioxide through photosynthesis. Carbon returns to the air through plant and animal respiration, microbial decomposition of organic remains and the combustion of biomass and fossil fuels. Class 9 Science Exploration New Book All Chapter Solution Revise, Reflect, Refine ...
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Piyush365
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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 ...