The two main types of tree are deciduous and coniferous trees. Deciduous trees shed their leaves annually, typically in the autumn, to conserve water and energy during colder months. They often have broad leaves and produce flowers and fruits. Examples include oak, maple, and birch. In contrast, coniferous trees, also known as evergreens, retain their needle-like leaves year-round and are adapted to withstand harsh conditions. They reproduce through cones and have a more streamlined shape, which helps minimize snow accumulation. Examples include pine, spruce, and fir. Both types play crucial roles in ecosystems and provide habitats, oxygen, and resources.