question: mountain stream:river:sea
choices.label: A B C D
choices.text: employee:company:group grass:lawn:prairie city:country:the earth gale:lightning:rainstorm
explanation: "mountain streams" and "rivers" belong to waters, and the "sea" belongs to seas, with the range of waters gradually increasing. "employees" are part of the "enterprise". "grass" is part of the "lawn". "cities" and "countries" belong to regions, which also include "the earth", with the scope of regions gradually increasing. "wind" and "lightning" are natural phenomena, which also include "rainstorms", without the gradual increase in space.
relation: mountain stream river sea R2.4
relation: employee company R2.3
relation: grass lawn R2.3
relation: city country the earth R2.4