Answer:
Musical structure.
Explanation:
The A represents a musical idea or ideas, the B represents new, contrasting material, and the final A represents a return to the familiar music heard in the opening of the piece.
<span>Earliest known ceramics: Ancient Greeks made pots for functional use. The Greeks would paint them with elaborate decorations during the 6th and 5th century BC. Circa 2500 BC: Bronze Age bowls and other ceramics 1000 BC (3000 years ago): Chinese ceramics 700-800 AD: Mayan vases and other ceramics</span>
