How is the phosphorus cycle different from the oxygen, nitrogen, and carbon cycles?
a.

it occurs at the fastest rate.
b.

it is not essential to life.
c.

it does not occur naturally.
d.

it does not involve the atmosphere.

I think the correct answer from the choices listed above is option D. The phosphorus cycle is different from the oxygen, nitrogen, and carbon cycles in a sense that it does not involve the atmosphere. The cycle only involves the Earth's surface. Hope this answers the question.

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