I drew a food chain system for this assignment. As you can see, the sun provides energy to the grass and plants and this enables them to grow. The mouse (2) then eats grass and plants. The snake (3) eats the mouse, who then gets eaten by a hawk/owl (4). When birds die, they are decomposed and broken down by fungi (5) and are turned into nutrients in the soil, which then allows the grass and plants to keep growing.