Question

If we hear a piece of music begin with an opening idea, move on to a new idea, and then return to the opening idea, the form is best described as:

Answer 1

Ternary form.

Step-by-step explanation:

If a piece of music begins with an idea, moves on to a new second section and then ends with the same idea that it began with, it follows an ABA structure. This form of music is known as ternary form, because there are three separate parts in the piece.