What is a passage in declamatory style for solo voice with simple harmonic accompaniment?

An aria is a passage in declamatory style for solo voice with simple harmonic accompaniment. It is typically found in operas and oratorios, and is often used to express a character's emotions or thoughts. Arias are usually written in a lyrical style, with a flowing melody and simple accompaniment. They can be either slow and expressive or fast and dramatic, depending on the mood of the piece. Some of the most famous arias include "Nessun dorma" from Puccini's Turandot, "O mio babbino caro" from Puccini's Gianni Schicchi, and "Ave Maria" from Schubert's Ave Maria.