Final answer:
Dylan's folk influence shaped the trajectory of rock music.
Step-by-step explanation:
Dylan's folk influence shaped the trajectory of rock music. Bob Dylan is widely recognized as one of the most influential figures in rock history. His folk years not only had a significant impact on his own music but also on the development of rock music as a whole. Dylan's rich imagery, poetic lyrics, and political themes resonated with audiences and inspired countless musicians to incorporate folk elements in their own rock music.