Lumber is wood that has been processed and cut into specific sizes for construction and other uses. It comes from trees like pine, oak, and maple, which are harvested and then sawed into planks, beams, and boards. Lumber is essential for building homes, furniture, and many other wooden products. There are different types of lumber, including softwood and hardwood. Softwood comes from coniferous trees, while hardwood comes from deciduous trees. Each type has its own characteristics, making them suitable for various projects. For example, pine is often used for framing, while oak is popular for furniture due to its strength and beauty.