The availability of phosphorus is different that that of carbon and nitrogen because it is found mostly in the atmosphere hydrosphere lithosphere biosphere

Lithosphere

Explanation:

Lithosphere is the part of the planet earth. It is a layer which includes a layer which is present in between the crust and the upper mantle. Phosphorus is most commonly found in the rocks and oceanic debris as phosphate salts which are the part of lithosphere. The rocks containing the phosphates when weather results in the release of the soil containing the phosphates these phosphates are useful for the growth of plants.

The majority of the phosphate is found in lithosphere, it is not found in the atmosphere. But other elements like carbon and nitrogen can be found in the atmosphere.

the endomembrane system i think

the correct answer is 2 and 4