In drama, see drama structures. In music, the way a work is structured. The A part represents a phrase of specified length, the B part a different phrase of specified length. The A and B phrases complement and enhance each other but may deal either with two parts of the same theme or with two different themes. After the B phrase, the piece returns to the A phrase or an altered version of the A phrase.
All parts end together.
The A phrase can be repeated or varied. All parts sing at the same pitch. The theme may be repeated between the variations. In visual arts, the element of art and design that pertains to an actual or implied 3-D shape of an image. Everyday objects recycled or incorporated into an artwork.