I would mark this answer as D, imagery. Because you have a descriptive seen and they as painting an image of what is around the characters POV.
Although the story does not refer to a special name, lets see that the place where Santiago goes fishing is the Caribbean Sea, in a town near Havana Cuba. The hut of Santiago always had proximity to the sea, due to its fishing activity it is perceived that it lived very close to the sea.
B because it is very logical
