Paragraph 1: instructs. The author tells a person the steps he/she should take. The purpose of the paragrah is to educate, that is instruct
Paragraph 2: narrates. The paragraph is a clear example of a story. And the main purpose of stories is to narrate. Also there are no instances of description.
Paragraph 3: Describes. The author tells the details of a crater, its size, features, etc. The kind of information included and the way it is written is characteristic of a description.
Paragraph 4: Persuades. Even thought there is narration and description, the primary purpose is to persuade the reader to have breakfast every day. You can tell by the exclamative structures the author uses, as well as the way the information is presented, putting emphasis on the effects caused by not having breakfast.