Answer:
The death of Eurydice in the beginning contribute to the development of the theme of the story because without her death, he will not go to the underworld to bring his beloved Eurydice and fight for his love.
Step-by-step explanation:
Orpheus is man who loved Eurydice who were died on the night of their marriage due to the biting of snake. Due to this death, Orpheus passes from a great grief and pain and decided to go to the underworld to bring back his love. So for this reason Orpheus go to the under world and request Hades to allow him to take his beloved Eurydice to the real world. If this death did not happened, the theme remain incomplete and did not develop.