In the phosphorous cycle, phosphorous enters the food chain when

A: it is in atom form

B: it is in the form of phosphate and bound in solids

C: it is the form of phosphate ions and dissolved in water

D: it is exposed to the air during weathering

The correct answer is option C.

Explanation:

The biogeographical cycle that tells about the movement of the phosphorous in the different spheres such as the lithosphere, geosphere, biosphere, and hydrosphere known as the phosphorous cycle.

In the soil and sediments, the phosphorus is present in the form of ions and dissolved in water, which is move through the roots to the plant and enters in the food chain and biosphere.

Thus, the correct answer is - option C.