Final answer:
Fitzgerald uses words like 'lavish,' 'extravagance,' 'magnificent,' 'glittering,' and 'dazzling' to set a mood of opulence and grandeur in Gatsby's parties.
Step-by-step explanation:
Fitzgerald carefully details Gatsby's parties in The Great Gatsby using specific words that create a particular mood. He portrays the parties as extravagant, lavish, and glamorous, using words such as 'lavish,' 'extravagance,' 'magnificent,' 'glittering,' and 'dazzling.' These words help to set a mood of opulence, grandeur, and excess, reflecting the decadence of the 1920s and the themes of materialism and illusion in the novel.