Question

select the correct answer from each drop - down menu. why are biogeochemical cycles important? earth is a closed system. that means the amount of rocks, metals, carbon, nitrogen, oxygen, and water on earth. so, it is essential that biogeochemical cycles these materials as they move through earth’s subsystems.

Explanation:

In a closed - system like Earth, the amount of key substances such as rocks, metals, carbon, nitrogen, oxygen, and water is finite. Biogeochemical cycles recycle these materials as they move through Earth's subsystems, ensuring their continuous availability for various life - sustaining processes.

Answer:

First drop - down: is finite
Second drop - down: recycle