Pragmatics: the brand of linguistics dealing with language in use and the contexts in which it is used, including such matters as deixis, the taking of turns in conversation, text organisation, presupposition, and implicature.
As it is a satirical essay, Swift must rely on his readers recognising that he does not mean what he says.
However, the satire is all the more effective for being delivered with unfaltering conviction.
Being published anonymously would have enhanced the effect (but it wasn't).
The extract of this anthology text that OCR gave us has missed the section where the author dismisses more realistic options that Swift implies ought to be on the agenda.
I'm not sure if this'll help in your exam but no marks would be lost by mentioning it.