Which sculpture material is known for being lighter and easier to carve than stone?

Wood is known for being lighter and easier to carve than stone. This is primarily due to its composition and structural characteristics. Wood is a natural material that can be cut and shaped with relative ease, allowing artists to achieve intricate designs and detailed forms without the heavy tools and intensive labor that stone requires.

In contrast, stone is significantly denser and more challenging to manipulate, generally requiring specialized tools to carve or sculpt it. While clay is also a softer material and widely used in sculpture, it is primarily malleable when wet and requires drying and firing processes to achieve permanence, distinguishing it from the carving properties of wood. Glass, although it can be sculpted, typically requires specialized techniques and can be hazardous to work with, further setting it apart from the carving properties associated with wood. Thus, wood stands out as the correct answer for its lighter weight and easier workability compared to stone.