Who are the prominent figures known for their contributions in the Impressionist movement besides Debussy?

The correct choice highlights Ravel as a prominent figure in the Impressionist movement alongside Debussy. Maurice Ravel is celebrated for his vivid orchestrations and innovative harmonies that parallel the artistic goals of Impressionism, which seeks to evoke moods and atmospheres through nuanced musical language. His works, such as "Boléro" and "Daphnis et Chloé," exemplify the Impressionist ethos with their emphasis on color, texture, and fluidity, similar to the visual arts of the time, which focused on light and movement.

Bartók and Ligeti, while influential composers in the 20th century, are not considered part of the Impressionist movement. Bartók's work is often associated with ethnomusicology and folk influences, while Ligeti is known for his avant-garde techniques. Thus, while both contributed richly to modern music, they do not share the same stylistic characteristics associated with Impressionism.

In conclusion, Ravel's contributions firmly place him within the Impressionist movement alongside Debussy, highlighting a significant aspect of early 20th-century music that sought to transcend traditional structure in favor of more evocative and fluid compositional techniques.