The Autobiography of Alice B. Toklas was written by

Fitzgerald is renowned for his novel "The Great Gatsby," which focuses on themes of wealth and the American Dream during the Jazz Age. The style and subject matter of Fitzgerald's works differ significantly from Hemingway's, making it unlikely for him to have penned this specific line about fishing and solitude.

Hemingway's distinctive writing style is characterized by simplicity and clarity, often portraying themes of endurance and the human condition. This opening sentence encapsulates the essence of "The Old Man and the Sea," where the protagonist's solitary fishing endeavors symbolize broader existential themes, affirming that this is indeed his work.

Dos Passos is known for his modernist works, particularly "U.S.A.," which weaves together narratives of American life in the early 20th century. His focus on social issues and urban experiences contrasts sharply with the fishing and personal struggle depicted in Hemingway's narrative, indicating he is not the author of this line.

Roth's works often explore complex themes of identity, sexuality, and Jewish American life, as seen in novels like "Portnoy's Complaint." The specific focus on fishing and the sea in the question does not align with Roth's narrative style or thematic concerns, making it improbable that he wrote this sentence.