Answer:
I'm pretty sure the answer is C. Topical.
Hello. Unfortunately, you did not enter the article this question refers to, which makes it impossible for you to answer it. However, I will try to help you as best I can.
To answer this question, you need to read the entire article. After reading this, you should assess what factors, elements, events, or situations the article presents that could have a major impact on Norman Bowker's PTSD. This impact has to be able to bring about large and positive results that cause differences in PTSD.
They change shape due to a number of reasons.
The easiest reason to understand why they change is that they erode.
The coasts around the the world erode due to waves hitting cliffs, the wind batting against the coasts etc. Over a long period of time we can see that they change in shape.
(sorry I don't know why they move)
The resolution is all his plans fall apart, since that is the part that resolves the book.