The correct answer is D. Veneering is a thin layer of wood that is glued to a less expensive wood to create a more attractive surface. It is often used in furniture making, cabinetry, and other woodworking projects.
Option A is incorrect because veneering does not involve carving out designs on timber planks. Option B is incorrect because veneering does not involve chemically treating timber planks. Option C is incorrect because veneering does not involve using a thick layer of superior wood.
Veneering is a popular technique for creating beautiful and durable wood surfaces. It is relatively easy to do, and it can be used to create a variety of different effects. If you are interested in learning more about veneering, there are many resources available online and in libraries.