The movement of the progress bar may be uneven because questions can be worth more or less (includi How do you know the writer used a point-by-point comparison strategy in the passage? The writer combines information about both kinds of books in each paragraph. The writer moves between the two kinds of books back and forth, throughout the passage. The writer covers all the information about e-books and then print books. The writer discusses e-books for several paragraphs and then discusses print books until the end.