Theme: Trees are vital to the existence of all living things, as they serve numerous practical and aesthetic functions. This feature book beautifully weaves together the important relationship among all living things, and primarily our dependence on trees to provide food, shelter and the air we breathe. LeVar explores the magnificent life cycle of trees in the forest and their importance to humans, animals, and the planet, and he explores how photosynthesis works. He also visits a scientist who climbs trees to study them more closely, and a family who harvests maple syrup.