Trees go through a life cycle starting as a seed that grows into a seedling and then a tree. As a tree it will grow flowers that become fruit. There are over 100,000 types of trees worldwide. Trees are plants as they do not move and get their food through photosynthesis rather than hunting for it like animals. Trees can grow in many places including forests, jungles, backyards and parks as long as they have sun, soil, water and a warm environment. Their bark protects the inside and trees stand upright due to their strong root system.