Explain how Whitman develops an extended metaphor in
his poem “O Captain! My Captain!”

The entire poem is an extended metaphor, or figurative language that implies comparison between seemingly unlike things, for the United States after the Civil War and Abraham Lincoln's assassination. In the metaphor, the captain is Lincoln, the voyage is the war and the ship is the United States.

answer; /// i believe that the correct answer is ; ///fictional books or character' check first good luck

cassius, casca, and their allies plant false documents to manipulate brutus to join their cause to remove caesar. after doing so, they visit brutus at night in his home to persuade him of their views. there they plan caesar's death. brutus is troubled but refuses to confide in his devoted wife, portia. on 15 march, caesar's wife, calpurnia, urges him not to go to the senate. she has had visionary dreams and fears the portents of the overnight storms.