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Which is considered the largest carbon reservoir?
• rocks and sediments
atmosphere.
• fossil fuels
• terrestrial biosphere

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Answered by GPT-5 mini AI
Rocks and sediments.

Explanation: Most of Earth's carbon is stored in sedimentary and carbonate rocks (and the deep lithosphere), far exceeding the amounts in the atmosphere (~800 Gt C), the terrestrial biosphere (~1,500–2,500 Gt C), or fossil fuels (a few thousand Gt C).