Answer:
The answer is concert overture.
Step-by-step explanation:
The concert overture imitated the opera overture, as a piece for orchestra that sets a mood. Yet where an opera overture introduced and set the tone for an opera, the concert overture was written to stand alone and be performed at a concert instead of in an opera theater.
These overtures were based on a work of literature and usually structured on Classical forms like sonata-allegro or rondo