Answer:
A Modest Proposal.
Explanation:
<em>"Reductio ad absurdum" </em>is a form of argument that aims to prove for or against the point leading to an absurd, ridiculous or even impossible conclusion. This use of the absurdity in the argument is the main focal point of the whole issue.
"Doctor Faustus" written by Christopher Marlowe is about a scientist who acquired the practice of necromancy to gain all the knowledge of the universe. There is no use of absurdity in this story.
"An Essay Concerning Human Understanding" by John Locke is a philosophical work concerning human knowledge and understanding. Though this essay has an argument, it contains no absurdity in it.
"The Ra pe of the Lock" by Alexander Pope contains absurd elements in its dealing of the unlawful "ra pe" of a lock of hair. This loss of hair even led to a battle, but does not have any argument for or against any point.
"A Modest Proposal" by Jonathan Swift is an essay about his "proposal' of dealing with the extreme poverty of the Irish society. By suggesting that the children be sold as meat which will provide a continuous flow of income for the parents and also provide a source of meat for the rich, Swift gave a really absurd argument for the solution.
Thus, "A modest Proposal" is an example of a reductio ad absurdum.