The correct answer is A) chronological.
The type of organization that will give coherence to an essay that narrates the events leading to the American Revolution is chronological.
When writing an essay, chronological order is the method or organization that serve us to present the events or steps in order. This means to present actions as they were occurring in time, by order. What happened first, then what happened next and so on.
So if you want to write an essay about the American Revolution, your best option is to use chronological order to make it easy for the reader.
The other options of the question were b) spatial, c) comparison and contrast, and d) order of importance.