Which of those is most likely to change your purpose for reading and make you more interested in what reading?

Having a specific goal in mind. When you know why you're reading something, it's easier to stay focused and engaged. For example, if you're reading a novel to learn more about a particular historical period, you'll be more likely to pay attention to the details of the setting and the characters' lives.

Reading something that is challenging but not too difficult. If a book is too easy, you'll get bored quickly. But if it's too difficult, you'll get frustrated and give up. The best books to read are the ones that challenge you without being overwhelming.

Finding a book that you're passionate about. If you're not interested in the subject matter of a book, it's going to be hard to stay engaged. When you find a book that you're passionate about, you'll be more likely to read it all the way through and even look for other books on the same topic.