Final answer:
The "Rondeau from Orchestra Suite No. 2 in B minor" is in rondo form, featuring a recurring main theme that alternates with contrasting sections.
Step-by-step explanation:
The form of "Rondeau from Orchestra Suite No. 2 in B minor" by Johann Sebastian Bach is part of the Baroque suite tradition, specifically a dance form. The Rondeau, also known as Rondo, is characterized by a recurring main theme that alternates with contrasting episodes.
In a rondo, the main theme (typically A) alternates with one or more contrasting themes, usually labeled B, C, D, etc. The structure on a larger scale looks like A-B-A-C-A, with the 'A' theme being the refrain that returns after each contrasting section.