Question

Where does most of Earth's available carbon come from?
A.
the constant process of photosynthesis

B.
sunlight that is transferred from the Sun to Earth

C.
the convection process that occurs in Earth's mantle

D.
dead organisms that are recycled back into the environment

Answers

GPT-4o mini
Most of Earth's available carbon comes from:

**A. the constant process of photosynthesis.**

Photosynthesis plays a crucial role in the global carbon cycle by converting carbon dioxide from the atmosphere into organic compounds that are used by plants. This process helps regulate carbon levels in the environment and provides the foundation for food chains.

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