choices.label: A B C D
choices.text: penguins:the antarctic whale:ocean panda:china birds:sky
explanation: "desert" is the living environment of "camels". the "antarctic" is the living place of the "penguin", not in the living environment. the living environment of the "whale" is the "ocean". "panda" lives in "china", but "china" is a country, not a living environment. "birds" can fly in the "sky", but the "sky" is not a living environment.
relation: camel desert R3.10
relation: whale ocean R3.10