Answer:
Photosynthesis is the process by which certain organisms such as plants or bacteria, through the use of sunlight, synthesize carbon dioxide and convert it into glucose, thus generating the very food that said organism consumes for its own survival. In addition, residual to this chemical process, these organisms produce the oxygen that the rest of the living beings need to live.
That is why vegetation is so important for the development of life, as it functions as a lung that oxygenates the planet and allows living beings to carry out their lives normally.