Answer:
Stevenson's essay uses both descriptive and narrative techniques when organizing his ideas. There is also parts in the the essay to show that he uses descriptive writing. Here is an example.
The country to which I refer was a level and tree-less plateau, over which the winds cut like a whip. For miles and miles it was the same. . . there was nothing left to fancy, nothing to expect, nothing to see by the wayside. . . and you were only accompanied, as you went doggedly forward, by the gaunt telegraph-posts and the hum of the resonant wires in the keen sea-wind. . . this was the nakedness of the North; the earth seemed to know that it was naked, and was ashamed and cold.
Also in Stevenson's essay he uses the narrative technique. We see this when he tells a story about a man who peered from the top of a cathedral and learned to appreciate a brief experience of beauty.
Explanation: I put this in my own words instead of using the sample answer. If you want me to change anything just put a comment. Thanks, Hope this helped.