Which work is a tragedy written by Sophocles?

The work that is a tragedy written by Sophocles is "Oedipus Rex." This classic Greek play is considered one of the most significant tragedies in Western literature. It centers around the themes of fate, free will, and the search for truth, depicting the story of Oedipus, a man who inadvertently fulfills a prophecy that foretells he will kill his father and marry his mother. The play illustrates the tragic consequences of human actions and the inescapability of fate, which are hallmarks of Sophocles' works.

The other titles listed are tragedies, but they were written by different playwrights. "Hamlet" and "Othello" are both works by William Shakespeare, who expanded the form of tragedy in the English language. "Long Day's Journey Into Night" is a modern American play written by Eugene O'Neill, exploring themes of addiction and family dynamics. It's essential to recognize the specific contributions of each playwright to appreciate the uniqueness of their tragedies.