Final answer:
F. Scott Fitzgerald named the 1920s the 'Jazz Age' to reflect the era's cultural revolution, characterized by lively jazz music, flappers, and a break from traditional norms, all against a backdrop of prosperity and new entertainment forms.
Step-by-step explanation:
F. Scott Fitzgerald referred to the 1920s as the "Jazz Age" to capture the spirit of the era characterized by lively music, new dances, and a general atmosphere of liberation and cultural upheaval. The period, also known as the "Roaring Twenties", was marked by an unprecedented wave of prosperity which, combined with the production of popular entertainment, led to a nonstop party scene replete with dancing, flappers, illegal drinking, and jazz music.
The term Jazz Age not only reflects the musical trends of the time but also encompasses the broader social and cultural transformations, including the women's rights movement, a shift in societal norms, and a departure from the conservatism of the previous era.