https://youtube.com/embed/e-cFL51IXdg

Much of what makes a tree is the basic structure and form. The crown (leaves) does the photosynthesis. The trunk provides advantageous height to the crown and transports food and fluids. The roots provide stability and absorb water and nutrients. Single stems (trunks) and at least 30 feet in height, at maturity, often defines a “tree”.