The abbreviation i.e. stands for “that is” in Latin.
The abbreviation i.e. is often used to introduce an example. In fact, while the abbreviation comes from the Latin “id est,” which means “that is,” in modern times we often translate it as an abbreviation for “in exemplum” or “in example.” Either way, the abbreviation is used when you are about to explain or offer an example that further describes something.
If you were writing an essay about the story, you could say something like this.
Jonas’s world has many rules, i.e. no lying, no taking food, and no keeping things to yourself.
In this case, the first part of the statement explains that there are many rules, and then examples of the rules are provided.