<span>In 'The Crucible', Arthur Miller uses situational, dramatic, and verbal irony, which, in the literary context, is the unexpected, to add comic relief, suspense, and intensity to some of the most dramatic scenes.</span>
What I have come to here, considering I just finished this lesson in my english myself. is that the central theme of this story is Survival of the Fittest, hope this helps
Ignore theme because people are annoying :)