Interesting.Questions that hook the reader in a text is called a rhetorical question.The questions needs to make the reader feel as if he/she is in what you're describing.
Simply make the reader intrigued in reading it. For example, you can use a title of an essay as a hook. Some writers may make their titles "Consider this" or "On that" and the reader is automatically interested and wondering what they should be considering or reading about.
