DENDROLOGY

Detailed explanation-1: -Since oxygen, a necessary component for both animal and human survival, is released as a byproduct of photosynthesis, it is crucial for both people and animals. For breathing, all life on earth needs oxygen.

Detailed explanation-2: -Photosynthesis in the forest Photosynthesis provides most of the oxygen that humans and animals breathe. Here’s how it works: Tree and plant roots absorb water, as well as minerals and nutrients, from the soil. At the same time, the leaves or needles absorb carbon dioxide from the air.

Detailed explanation-3: -Photosynthesis also results in the release of oxygen into the atmosphere. In short, to eat and breathe, humans depend almost entirely on the organisms that carry out photosynthesis.

Detailed explanation-4: -Oxygen is needed to break the sugar into carbon dioxide, releasing energy the plants can use to stay alive. However, plants also take in energy from the sun(light), carbon dioxide from the atmosphere, and water from the soil; they use all of them in order to make sugar, and release oxygen.