Andy goldsworthy uses natural materials to create sculptures that are ephemeral. Andy Goldsworthy is a popular artist who is known for constructing complex and elaborate site-specific sculptures from natural materials. Hence, the correct answer is natural materials. Read below about sculptures.
What are sculptures?
Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts.
Therefore, the correct answer is as given above
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