Question

which of the following explains why elements, such as carbon, oxygen, and nitrogen are never permanently removed from the ecosystem
they cycle through various forms of life and phases in the biosphere by biogeochemical cycles.
they are replenished by the sun
they are replaced by volcanoes
humans manufacture more of them

Explanation:

Los elementos como carbono, oxígeno y nitrógeno forman parte de ciclos biogeoquímicos. Estos ciclos los mueven a través de diferentes formas de vida y fases en la biosfera, lo que significa que nunca son permanentemente removidos del ecosistema.

Answer:

They cycle through various forms of life and phases in the biosphere by biogeochemical cycles.