what does the author of how to prepare for a road trip do with the images next to the list of sections at the beginning of the documnet

The author of "How to prepare for a road trip" repeats each image under the corresponding section heading, this because he wants to enhance clarity about what the section he is talking about and also because it helps the reader to imagine how the process would be. For example when the author talks about having food the picture are some healthy snaks or snacks easy to pack.

the question is the text structure of this passage is. a. chronological order. b. problem and solution. c. cause and effect. d. compare and contrast.