How was Gatsby‘s party

 The atmosphere of Gatsby's parties as elegant, extravagant, wild in a way, and opulent. There is lots of laughter, music and dancing and it can be kind of overwhelming at times.

Explanation:

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.