Final answer:
One fact that makes ancient art unique is the utilization of hieroglyphics as a form of artistic expression, which combined writing with aesthetic design.
Step-by-step explanation:
When discussing unique aspects of ancient art compared to prehistoric art, one fact about ancient art that makes it unique is d. Utilization of hieroglyphics as a form of artistic expression. Unlike prehistoric art, which predominantly featured cave paintings with animal figures and abstract symbols, ancient art sometimes included a written component using hieroglyphics, particularly in Egyptian culture. These complex symbols were not only a form of writing but also held significant artistic merit and conveyed stories and meanings beyond their literal translation.