An oratorio is a large-scale musical composition for orchestra, choir, and soloists. It typically tells a religious story and is performed in a concert setting without the use of costumes or staging, distinguishing it from opera.
A madrigal is a type of secular vocal music composition, usually written for a small group of voices, and was particularly popular during the Renaissance.
An aria is a solo vocal piece, often found within an opera, that allows a character to express their emotions or thoughts.
An elaborate stage show could refer to a variety of performance types, but it is not specifically defined as an oratorio, madrigal, or aria.
In summary, an oratorio is a sacred musical work performed concert-style, while madrigals and arias are types of vocal music with different characteristics and contexts.