ANSWER: a. tragedy.
EXPLANATION: Many of William Shakespeare's writings were tragedies. His romantic writings were released at a later stage in his career and was either classified as a tragedy or a comedy. Titus Andronicus, Romeo and Juliet, Julius Caesar, Hamlet, Troilus and Cressida, Othello, King Lear, Macbeth, Timon of Athens, Antony and Cleopatra are few of the tragedy plays of Shakespeare.