DENDROLOGY

Detailed explanation-1: -Photosynthesis converts light energy into chemical energy that animals and people can consume. Photosynthesis reduces the carbon dioxide in our atmosphere and generates the oxygen that people and animals breathe in.

Detailed explanation-2: -Plants take up carbon dioxide from air and give out oxygen during photosynthesis. Animals take up oxygen and release carbon dioxide during respiration. This maintains a balance between oxygen and carbon dioxide in the atmosphere.

Detailed explanation-3: -They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel. These primary producers form the base of an ecosystem and fuel the next trophic levels. Without this process, life on Earth as we know it would not be possible.