Final answer:
John Coltrane played a significant role in advancing representations of spirituality in jazz. His experimentations with world music sources expanded the sonic palette of jazz.
Step-by-step explanation:
John Coltrane played a significant role in advancing representations of spirituality in jazz. His music was deeply influenced by his spiritual beliefs and he sought to express his connection to a higher power through his compositions and performances. Coltrane's experimentations with world music sources were important because they expanded the sonic palette of jazz, incorporating elements from different cultures and creating a more diverse and inclusive sound. By embracing music from around the world, Coltrane pushed the boundaries of jazz and challenged conventional notions of what the genre could be.