What is the style of singing called that mimics speech and is used to advance the storyline in operas?

The style of singing that mimics speech and is used to advance the storyline in operas is known as recitative. This form allows for dialogue-like vocal delivery, with a focus on the natural rhythms and inflections of spoken language. Recitative serves a crucial function in opera, as it helps propel the narrative forward and connect the more melodically elaborate pieces, like arias, which focus more on expressing emotion and showcasing vocal talents.

In contrast, arias typically emphasize lyrical melody and are often solo performances that express a character's inner thoughts or feelings, rather than advancing the plot directly. Chorales are congregational hymns commonly associated with religious settings, while duets involve two singers performing together, showcasing harmonies and interplay between characters but not specifically advancing the story in the same manner as recitative does.