What is the title of the piece "Dies irae" from?

“Dies irae” is a well-known chant from the Catholic Requiem Mass that focuses on the Day of Judgment. The piece typically embodies themes of mortality and divine judgment, which aligns beautifully with the context of a Requiem.

The title "Dies irae" is famously associated with Wolfgang Amadeus Mozart's "Requiem in D Minor" among other compositions, as it is featured prominently within many Requiem settings throughout classical music history. This connection to the Requiem, a mass for the deceased, demonstrates the somber and reflective nature of the piece, making it a fitting inclusion within a work specifically intended to address themes of death and the afterlife. The other options, while important classical works, do not contain the "Dies irae" theme; thus, the emphasis on the theme within a Requiem makes the title undeniably linked to the correct answer.