The best pine wood for making a closet is Eastern White Pine. This species is highly regarded for its versatility, durability, and workability. Eastern White Pine (Pinus strobus) is known for its straight grain, which makes it easy to cut and shape, and its light weight, which eases handling during construction. Additionally, it is relatively soft, which means it can be sanded and finished to a smooth, attractive surface.

According to the U.S. Forest Service, Eastern White Pine has a Janka hardness rating of 380, which is suitable for furniture and cabinetry. This rating indicates that it is strong enough to withstand the wear and tear of daily use in a closet. The wood's low density also contributes to its ease of handling and its resistance to warping and splitting, making it an excellent choice for custom closet construction.

Furthermore, Eastern White Pine is a sustainable option. It is a fast-growing species that is widely available in North America, making it a responsible choice for environmentally conscious builders. The American Wood Council reports that Eastern White Pine is one of the most commonly used softwoods in the United States, with a significant portion of the wood coming from certified sustainable forests.

In comparison to other pine species, such as Southern Yellow Pine or Western White Pine, Eastern White Pine stands out due to its superior workability and aesthetic appeal. Southern Yellow Pine, while also a durable option, can be more difficult to work with due to its higher density and more complex grain pattern. Western White Pine, while similar in some respects, is less commonly available and can be more expensive.

In conclusion, Eastern White Pine is the best pine wood for making a closet due to its combination of workability, durability, sustainability, and aesthetic qualities. Its straight grain, light weight, and low density make it an ideal choice for custom closet construction, while its sustainability aligns with modern environmental standards.