D I believe sorry if this is incorrect I don't have much knowledge of this book
The correct answer is "Plot memorable events on timeline" because autobiographical is a kinds of writing you could write about your timeline.
Hope this helps ◕3◕
Last summer I happened to be crossing the plains
Hospitals are useful for us because in hospitals sick people are treated.
Answer: Nevertheless
Explanation: Well otherwise would be the opposite of specifically, so it's not that one. Similarly isn't similar to specific at all so using that instead also wouldn't work. Incidentally just isn't the correct word you would use in a sentence like that so I would say the answer is nevertheless.