Answer:
Chronological
Explanation:
A chronological structure is one that presents a series of events in the same order in which they happened. A chronological structure is very useful when a text needs to maintain a certain progression in order to be logical and cohesive. In this example, if the author wrote about his cancer diagnosis, and the actions that he took afterwards, the order of these events would be very important, which means that he would most likely benefit from a chronological structure.
