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 boards, beams, and planks. Lumber is essential for building homes, furniture, and various structures, making it a vital resource in the construction industry. There are different types of lumber, including softwood and hardwood, each with unique properties. Softwood, like cedar and fir, is often used for framing and outdoor projects, while hardwood is preferred for furniture and flooring due to its durability and aesthetic appeal.