Final answer:
The closing ritornello of movement 3 in Vivaldi's Concerto for Two Mandolins is likely characterized by a return to the opening material, offering a sense of finality, a common practice in the Baroque period for structuring music.
Step-by-step explanation:
What is true of the closing ritornello of movement 3 of Vivaldi's Concerto for Two Mandolins? The ritornello form, particularly in Vivaldi's work, involves a recurring thematic material that is presented by the full ensemble (the ripieno), while solo episodes alternate with these ritornello sections. In the specific case of the third movement's closing ritornello, it would traditionally include a return to the opening material, providing a sense of closure and finality to the movement. This reflects the Baroque style, where ritornello forms were commonly used to bring structure and coherence to a piece of music with their repeated themes.