Photosynthesis is the process by which green plants manufacture carbohydrate (glucose). It involves the intake of gaseous carbondioxide, water, and minerals the plants take in from their surrounding and its conversion to sugar and gaseous oxygen.
Explanation: Plants use carbon dioxide, oxygen and water in photosynthesis. Photosynthesis is the process by which plants make food, for themselves and indirectly.
In energy partitioning, metabolizable energy less less heat increment (energy lost as heat) gives the net energy. The net energy is further broken down to energy used for production and energy used for maintenance.