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Explanation:

HEY MATE ....

➞Photosynthesis is a crucial energy converting process by which plants produce molecular oxygen and carbohydrates by the use of photons present in the light.

➞ The natural source of light, the sun, helps the green coloured plants to fix the atmospheric carbon dioxide in to usable molecular oxygen, that human happen to breathe.

➞They help in maintaining a balanced level of oxygen and carbon dioxide in the atmosphere.

➞ Almost all the oxygen present in the atmosphere can be attributed to the process of photosynthesis, which also means, that respiration and photosynthesis go together.

➞Also, the chemical energy stored in plants is transferred to animal and humans, when they consume plant matter.