A tree helps you survive in the world. Well, a tree doesn't use oxygen like you do. A tree takes in a gas in the air called carbon dioxide. It then lets out oxygen. Without trees and other plants, you wouldn't be able to live on the earth.
Trees make their own food.
No, they don't slap together a peanut butter and jelly sandwich. This sugar helps trees grow leaves and branches for caterpillars and deer to eat. We know that trees and other green plants make their own food. They are the makers, or producers. They are the only things on the earth that can make food from sunlight, water, and carbon dioxide.