Why is phosphorus necessary for life?
Phosphorus is one of the basic atoms that form components in your body.
Your DNA, for example, is a continuous chain of molecules. These individual molecules are composed of phosphates (PO4 3-). The phosphate being composed of P (phosphorus). Without the phosphorus, there would be no DNA, and life would be IMPOSSIBLE.
Moreover, the energy you generated after eating a meal is in the form of ATP. The P standing for phosphate (PO4 3-), which in turn is composed of phosphorus. Without energy, your body wouldn't be able to survive, and life would be IMPOSSIBLE.