Which of the following remains constant in Earth's carbon cycle? o the total mass of available carbon
O the way organisms use carbon
O the physical state of carbon-containing molecules
O the molecule in which a particular carbon atom is found

the molecules in which a particular atom is found.

Explanation:

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answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.