AABB is a description of _______ form.

• Ternary
• Da capo
• Movement
• Binary

Binary

AABB is a description of Binary form.

To determine the answer to this question, we need to understand the meaning of the term "AABB" in the context given. The term "AABB" is commonly used in music to describe a specific form or structure in a musical composition.

In this case, each letter represents a different musical phrase or section of the composition. The letter 'A' typically represents one musical phrase, while the letter 'B' represents a contrasting musical phrase. The form "AABB" means that the composition consists of two phrases in the order of A-A-B-B, with the B phrase providing contrast or variation to the A phrase.

Now, we need to identify the correct description for the "AABB" form based on the options provided:

1. Ternary form: Ternary form (ABA) consists of three distinct sections, with the middle section providing contrast to the outer sections. Since "AABB" does not match this structure, ternary form is not the correct description.

2. Da capo: Da capo (D.C.) is a musical term that means "from the beginning." It is typically used to instruct musicians to return to the beginning of the composition and play it again. Since "AABB" does not represent the instruction to repeat from the beginning, da capo is not the correct description.

3. Movement: In music, a movement refers to a self-contained section or part of a larger musical work. It is not directly related to the specific form or structure being described. Therefore, movement is not the correct description.

4. Binary form: Binary form (AB) consists of two distinct sections, with the second section providing contrast to the first section. Since "AABB" matches this structure, binary form is the correct description for the form being described.

Therefore, the correct answer is "Binary".