<span>A.) high-energy 3-carbon molecules...
Like 3-Phosphoglyceric acid is a 3-carbon sugar which completes the cycle by converting itself into 6-carbon molecule.
Hope this helps!
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<span>This is invalidate, because the amount of energy should stay constant.</span>
<span> The </span>agents of metamorphism<span> include heat, pressure (stress), and chemically active fluids.</span>
7 possibilities total 3 steps.