In the biosphere, what acquires carbon present in the atmosphere

The correct answer would be - Autotrophs or green plants.

Explanation:

Terrestrial autotrophs in the terrestrial biosphere capture the carbon present in the atmosphere in the form of the carbon dioxide directly to perform the photosynthetic process from the air. On the other hand, the marine biosphere the marine autotrophs obtain carbon from the water in the dissolved form of carbonic acid.

The autotrophs or the green plants present in both biosphere incorporated the carbon from the atmosphere into the biosphere.

Thus, the correct answer is - autotrophs or green plants.