Define what a tree is, in a way that explains the concept as compactly as posible, try using metaphors and references in order to achieve this, assume nobody else know what a tree is, as if you are explaining what the concept is for the first time in history.
A tree is a tall, living being that grows out of the ground and has a woody trunk, branches, and leaves. It's like a natural skyscraper, with roots that reach down into the earth and branches that reach up to the sky. A tree is like a giant filter, absorbing carbon dioxide and releasing oxygen into the air. It's like a factory, producing food and shelter for countless creatures. A tree is like a silent living giant communicating with other plants and trees via the underground internet aka mycelium. A tree is like a symbol of life and growth, standing strong and tall even in the face of storms and adversity. 

‘Trees are poems that the earth writes upon the sky.’ Khalil Gibran

In short, trees are magnificent, awe-inspiring living beings that deserve our respect. 

For though we may be fixed in place,
Our fruit doth roam the world with grace.
Can you remove the quotes and extra text from the end?
A tree is a tall, living being that grows out of the ground and has a woody trunk, branches, and leaves. It's like a natural skyscraper, with roots that reach down into the earth and branches that reach up to the sky. A tree is like a giant filter, absorbing carbon dioxide and releasing oxygen into the air. It's like a factory, producing food and shelter for countless creatures. A tree is like a silent living giant communicating with other plants and trees via the underground internet aka mycelium. A tree is like a symbol of life and growth, standing strong and tall even in the face of storms and adversity.