Photosynthesis:
Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of carbon dioxide and water.

Diagram:
The diagram of photosynthesis shows that it is a process that takes place in two stages. The first stage is called the light-dependent reaction, and the second stage is called the light-independent reaction.

Light-Dependent Reaction:
This reaction takes place in the thylakoid membrane of the chloroplast and requires light energy. The process includes the following steps:

- Light energy is absorbed by chlorophyll and other pigments present in the thylakoid membrane.
- This energy is used to split water molecules into oxygen and hydrogen ions.
- The oxygen is released into the atmosphere, while the hydrogen ions are used to generate ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).

Light-Independent Reaction:
This reaction takes place in the stroma of the chloroplast and does not require light energy. The process includes the following steps:

- The ATP and NADPH generated in the light-dependent reaction are used to power the formation of glucose from carbon dioxide.
- This process is called the Calvin cycle or the dark reaction.
- The glucose formed is used by the plant as food, and the excess is stored as starch.

Conclusion:
Photosynthesis is a vital process for all living organisms, as it provides the basis for the food chain. It helps to maintain the balance of oxygen and carbon dioxide in the atmosphere and is responsible for the production of the oxygen we breathe.