Concept:Settlements located near water bodies generally depend on fishing as their main occupation.
Explanation:From the map, Oki is situated close to a river or water body.
This gives the people easy access to fish.
Fishing therefore becomes the most natural and likely occupation for them.
Mining is not indicated because no mineral deposits are shown around Oki.
Farming is possible, but the close location to the river makes fishing more suitable.
Lumbering requires dense forests, which are not visible near Oki on the map.
Hence, based on the settlement's position, fishing is the best choice.
Answer:A. fishing
