Final answer:
Roman copies of ancient Greek art are often the only evidence of the vanished original sculptures. One way to spot a Roman copy is by looking for added supports, such as rectangular blocks or tree stumps, which were added to help buttress the weight of the marble sculpture.
Step-by-step explanation:
Roman copies of ancient Greek art are often the only evidence of the vanished original sculptures. The Roman copies were usually made of marble, while the originals were made of bronze. One way to spot a Roman copy is by looking for added supports, such as rectangular blocks or tree stumps, which were added to help buttress the weight of the marble sculpture.