These open-mesh gauze curtains can be transparent or translucent depending on whether the light hits from the front or behind. What are they called?

cyclorama?

it is a type of curtain.

i believe the answer is: a.  abstract forms were often used to represent human figures.

representing human figures in abstract forms is often used in the geometric period, not hellenistic  period.   during the hellenistic  period,   aesthetic value derived from creating arts which mimic the actual shape of a certain object or individuals.

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why are there few examples of totem poles from before 1900

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