Question

the carbon cycle, the active cycling of carbon within and between earths spheres, sustains life on earth. it regulates climate, supports soil fertility, helps maintain an optimal ocean chemistry, and replenishes essential carbon compounds that organisms need to survive. complete the sentences. the carbon cycle describes the of carbon within and between earths spheres. it is critical for sustaining earths , which contains all living things. movement...biosphere creation...geosphere creation...atmosphere movement...hydrosphere

Explanation:

The first blank: The text mentions "the active cycling of carbon", so "movement" is appropriate.
The second blank: The biosphere is the part of Earth that contains all living things.

Answer:

movement...biosphere