A satire is a literary genre, and often graphic arts too. Its main purpose is to criticize ideas or people in a humorous way in order to show their faults. However, a satire is meant to be humorous, its major intent is to encourage social criticism by drawing people's attention thanks to the irony, sarcasm and parody used as main features of a satire.
The conflict is the central problem of the story and is what the story is about. The theme is the message of the story, so it can't be the answer. The protagonist isn't a problem, the protagonist is the main character.
