The diagram illustrates the process of photosynthesis, by which green plants produce food using sunlight, water, and carbon dioxide.
Overall, it can be seen that photosynthesis consists of several stages, beginning with the absorption of light energy and ending with the release of oxygen into the air.
At the first stage, sunlight is absorbed by chlorophyll in the leaves, which gives plants their green colour. At the same time, carbon dioxide enters the leaves through small openings called stomata. Water is absorbed from the soil by the roots and transported through the stem to the leaves.
Inside the leaves, where the process takes place, water, carbon dioxide, and sunlight are combined to produce sugar. Oxygen, which is a by-product of this process, is released into the air through the stomata. Some of the sugar is stored in the roots as starch for later use, while the water lost from the leaves is replaced through the roots