Which of the following is a work by John Heywood?

John Heywood is best known for his contributions to English drama during the Tudor period, particularly his work in the realm of interludes and moral plays. "The Seven Deadly Sins" is a notable example of his work, as it portrays the classic vices in a dramatic format, allowing audiences to engage with and reflect on moral themes and societal values. Heywood’s unique style often blended humor with moral lessons, making his works both entertaining and instructive.

The other choices, while they may be significant works in the theater canon, are attributed to different playwrights. "The Mourning Bride" is written by William Congreve, "The Alchemist" is attributed to Ben Jonson, and "The Farce of Sir John Oldcastle" is often linked to the early development of English drama but is not a work by Heywood. Recognizing the authorship of these plays helps to illustrate the distinct contributions of various playwrights to the evolution of English theatre.