Final answer:
Jean-Baptiste Lully composed music for ballets in the court of Louis XIV, contributing to the development of the art form during the Baroque period in France.
Step-by-step explanation:
Jean-Baptiste Lully was a composer who is known for his contributions to ballet in the court of Louis XIV. He composed music for many ballets, including the most notable work called 'The Sun King' or 'Le Ballet de la Nuit'. Lully's music played a significant role in the development of ballet as an art form during the Baroque period in France.