In humans, some of the energy derived from the food we eat is stored in our body in the form of glycogen.

Carbohydrates are utilized for providing energy to the plant, and when not used immediately, they are stored as starch, serving as an internal energy reserve.

Carbon dioxide and water are taken in during photosynthesis, and they are converted into carbohydrates in the presence of sunlight and chlorophyll, serving as stored energy.

Photosynthesis fulfills the carbon and energy requirements of autotrophic organisms.