Answers: Intro, Body, and Conclusion
Like every other essay, an informative essay has three passages, introduction, body, and conclusion. Introduction: since the purpose is to educate the audience regarding the topic, many start the essay with the dictionary definition of the topic. While you can always do that, but it is suggested to not, as it becomes very cliché.
The purpose of writing an informative essay is to educate others on a certain topic. You should not express your opinion and do not try to persuade others to take a certain action. If you are writing an informative essay for the first time, better create an outline first.
