Answer:
Step-by-step explanation:
Dystopias are settings where things are the opposite of perfect (utopia is the opposite of a dystopia). With this in mind, consider stories where lands (communities, countries, worlds, etc) are described in a negative light - maybe it's apocalyptic, maybe it's been taken over by robots, maybe it's being dictated by a controlling leader who makes every decision for every person. Through description of the setting, themes of inequality; danger; survival of the fittest etc. can be formed, simply due to how the author paints a picture of the way of life. Hopefully this gives you things to consider to form your own answer.