Answer:
The correct answer will be metabolism.
Step-by-step explanation:
Photosynthesis is a process performed by the plants and green bacteria which produces sucrose using carbon dioxide and water in the presence of sunlight.
The process of photosynthesis is a sum of complex reactions which takes place in two phases: light and dark reaction. Since it involves reaction, it is a part of a characteristic feature of life called "metabolism" which helps in the production of a molecule that is glucose. This glucose undergoes oxidation through cellular respiration to produce energy in the form of ATP.
Thus, metabolism is the correct answer.