Who composed la favola d'orfeo, a work that marks the beginning of opera as a major art form? claudio monteverdi alessandro scarlatti giacomo carissimi barbara strozzi?

The correct answer is Claudio Monteverdi.

This opera is based on the Greek myth of Orpheus, who ventured into Hell after his loved one, Eurydice, died. He was told that he shouldn't look at her until both of them left Hades, however, he couldn't restrain himself, took a look at her, and she remained in Hell forever.