Summarize the process of photosynthesis?

he process of photosynthesis in plants consists of a complex series of biochemical reactions. It converts CO2 into carbohydrate which involves the reduction of carbon with H2O as reductant.

Reduction is a chemical reaction that results in the gain of electrons, or gain of hydrogen, or loss of oxygen. The reverse reaction is called oxidation which involves the removal of electrons from an atom, ion, or compound, or removal of hydrogen, or gain of oxygen. The reduction of a substance also involves the oxidation of another, as in photosynthesis.

An overall summary of the process of photosynthesis is commonly represented by the  chemical equation given below.  

6CO2 + 6H2O + light energy   → C6H12O6  + 6O2