The tree outside our window is massive.
Have you ever looked at a tree from an upstairs window? What parts of the tree do you see?
Think about the parts of a tree you see when you are looking at it from high up. Are these parts the same as the parts you see from the ground?
Look at the picture. You can't see grass, or people walking. These windows are high up. You can see the top part of the tree in all three windows. The tree is very big.