choices.label: A B C D
choices.text: saudi arabia:rich in oil china:the largest population united states:on wheels russia:the gas station of the world
explanation: "australia" is known as the country "riding on the back of a sheep", and "riding on the back of a sheep" is an anthropomorphic description of "australia". "saudi arabia" is a country "rich in oil", but there is no anthropomorphism. "china" is the country which has "the largest population", but there is no anthropomorphism. "america" ​​is referred to as the country "on wheels", and "on wheels" is an anthropomorphic description of "america". "russia" is called "the gas station of the world", and "the gas station of the world" is a metaphor, not a personification.