Answer:
using energy
Explanation:
During the process of photosynthesis, plants convert water and carbon dioxide into sugar ( glucose) and oxygen by using light energy from the sun. The energy in the glucose molecules is used for carrying out various functions in the cell such as various metabolic processes. The oxygen, however, is produced as a byproduct which is released into the atmosphere. Hence, using energy is the best option which described the process of photosynthesis.
