In a modern sense, comedy (from the , "kōmōidía") refers to any discourse or work generally intended to be humorous or amusing by inducing laughter, especially in theatre, television, film, and stand-up comedy. The origins of the term are found in Ancient Greece. In the Athenian democracy, the public opinion of voters was influenced by the political satire performed by the comic poets at the theaters. The theatrical genre of Greek comedy can be described as a dramatic performance which pits two groups or societies against each other in an amusing agon or conflict. Northrop Frye depicted these two opposing sides as a "Society of Youth" and a "Society of the Old". A revised view characterizes the essential agon of comedy as a struggle between a relatively powerless youth and the societal conventions that pose obstacles to his hopes. In this struggle, the youth is understood to be constrained by his lack of social authority, and is left with little choice but to take recourse in ruses which engender very dramatic irony which provokes laughter. 

Satire and political satire use comedy to portray persons or social institutions as ridiculous or corrupt, thus alienating their audience from the object of their humour. Parody subverts popular genres and forms, critiquing those forms without necessarily condemning them.
How does satire and political satire use comedy?
to portray persons or social institutions as ridiculous or corrupt, thus alienating their audience from the object of their humour.