Through ........ the ills of society are criticised with the objective of having them corrected

The literary technique through which the ills of society are criticized with the objective of having them corrected is called satire. Satire is a literary form that uses irony, sarcasm, and ridicule to expose and criticize people's stupidity or vices, particularly in the context of contemporary politics and other topical issues. It is usually intended to bring about change by exposing and ridiculing social or political issues, often using humor or wit to do so.