Final answer:
Taylor Swift is the artist who moved to Nashville at age 14 to start her music career, which led her to become a renowned name in the music industry.
Step-by-step explanation:
The artist who moved to Nashville to start their career at age 14 is Taylor Swift. Taylor Swift is known for her successful career in country music, which later transitioned into pop. Moving to Nashville, the heart of country music, was a significant step in pursuing her musical aspirations. This move proved fruitful as she has since become one of the most prominent figures in the music industry.