Identify the chemical equation for photosynthesis and explain why it is necessary for the survival of animal species

6CO2 + 6H2O + light energy = C6H12O6 + 6O2.

Carbon dioxide + water + light = glucose (sugar) + oxygen

This is neccesairy for the survival of animals because it creates the oxygen we need, as well as uses some of the carbon dioxide we create. Additionally, the ability of plants to make sugar via photosynthesis is where all of our energy and nutrition comes from. All animals use the sugar that plants create to survive.