Answer: If you look it up online it tells you exactly why, and has reasoning for everything and will be way more accurate.
Explanation:
The sun--solar energy--is at the heart of the cycle of life, with all the sustenance relationships referred to as the food web. The sun is the ultimate source of energy for animals, but its energy must be harnessed by plants before it can be used by animals. Animals get energy by processing complex foods.
Photosynthesis can be defined as the process by which green plants manufacture their food. Photosynthesis is important not only to plants themselves but also to animals, which depend on plants for food.
To bring oxygen in the body because it is a respiratory organ fish
