Which of the following is NOT a traditional sculpture material?

The choice of plastic as not being a traditional sculpture material is accurate in the context of historical sculpting practices. Traditional sculpture materials have primarily included stone, wood, and metal, each with a long-standing history in various cultures throughout time.

Stone has been used since ancient times for its durability and ability to hold detailed carvings, as seen in classical sculptures from Greece and Rome. Wood has also played a significant role in sculpture, as artists utilize its natural textures and forms to create varied and intricate works across different cultures. Metal has been employed in traditional sculptural practices as well, allowing for both small-scale detailed works and large monuments, with bronze being especially valued due to its strength and fine casting qualities.

Plastic, on the other hand, is a relatively modern material that emerged with the advent of industrial processes in the 20th century. While contemporary artists may use plastic for its versatility and accessibility, it does not fit within the framework of traditional materials historically used in sculpture. Thus, identifying plastic as the non-traditional material in this grouping is accurate.