question: ocean:water:oxygen
choices.label: A B C D
choices.text: organism:plant:microbe army:warrior:weapon grassland:forage:chlorophyll earth:mountains:forest
explanation: "water" is part of "ocean" and "oxygen" is part of "water". "plant" is a "organism" "warrior" is part of "army", "warrior" uses "weapons" to fight, and "weapon" are not part of "warrior". "forage" is a component of "grassland", and "chlorophyll" is a component of "forage". "mountains" are part of the "earth", and "mountains" refer to mountains that extend in a certain direction and include several mountains and valleys. there is no obvious logical relationship between "mountains" and "forest".
relation: water ocean R2.3
relation: oxygen water R2.3
relation: organism plant R2.2
relation: warrior army R2.3
relation: warrior weapon R3.10
relation: forage grassland R2.3
relation: chlorophyll forage R2.3
relation: mountains earth R2.3