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Which of the following is an indicator that scallops are done?

An altar was commissioned to depict the accomplishments of the roman emperor augustus (between 13 and 9 bce). what was the purpose of this artwork? a. spiritual b. ritualistic c. commemorative d. preservation

To create an illustration of perspective, this artist did all of the following except 1) show clear orthogonal lines 2) have an implied vanishing point 3) distort proportion to keep the background and foreground the same size 4) include value changes between the foreground and background i was thinking maybe 1