Which of the following defines Gamelan music?

Gamelan music is characterized by its unique instrumentation, which prominently features metal xylophones, often referred to as gender and gangsa, along with various types of drums. This ensemble typically includes a wide array of metallic instruments, creating a distinctive sound that is rich in timbre and tonal color. The interplay between these metal percussive instruments and the rhythmic patterns contributed by the drums forms the backbone of Gamelan music.

While other musical traditions may involve strings, vocal harmonies, or chanting, Gamelan does not primarily focus on these elements. Instead, it emphasizes the combination of metal percussion and the intricate layering of sounds that produce a harmonious yet complex musical texture typical of Indonesian Gamelan ensembles. Thus, the correct choice appropriately identifies the defining characteristics of this genre.