Which statement accurately defines an Amphitheater?

An amphitheater is accurately defined as a circular or oval open-air venue with seating arranged around a central performance area. This architectural form dates back to ancient Rome and Greece, where it was primarily used for gladiatorial contests and public spectacles. The distinct characteristic of an amphitheater is its tiered seating that allows audiences to enjoy performances from various angles, which enhances visibility and acoustics.

This open-air design also distinguishes it from an indoor concert hall, which is typically enclosed and designed for specific acoustical properties suitable for indoor performances. Similarly, an amphitheater differs from venues for art exhibitions and private homes since its primary function is to host large-scale public events rather than serving as a gallery space or residence. Thus, the definition of a circular theater with open-air seating aligns perfectly with the historical and functional aspects of amphitheaters.