Question

An _______________ is a play set to music, sung to orchestral accompaniment, with scenery, costumes, and action.

Answer 1

Answer: opera

Explanation:
An opera is a drama which is set to music performed by an orchestra, ad with actors singing and playing roles in the drama.
Examples of well-known operas are The Marriage of Figaro, The Pirates of Penzance, and the Mikado.