Final answer:
George Wilson learns that Gatsby's car killed Myrtle when Tom Buchanan reveals this to him, leading to pivotal events in 'The Great Gatsby'.
Step-by-step explanation:
In F. Scott Fitzgerald's The Great Gatsby, George Wilson learns that it was Gatsby's car that killed Myrtle when Tom Buchanan tells him so. This information profoundly affects Wilson and ultimately leads to the tragic ending of the novel. It's important to note that Fitzgerald focuses on the individual stories of his characters, making Gatsby's tale unique and not representative of any other figure of the 1920s. This narrative choice by Fitzgerald reflects the underlying themes of illusion and reality that are prevalent throughout the book.