question: bone:muscle
choices.label: A B C D
choices.text: gear:spring hands:dial fruit core:peel tires:car
explanation: humans and animals are composed of "bones" and "muscles", and "muscles" pull the "bones" to move. the components of the driver include the "gear" and the "spring", and the "spring" drives the "gear" to rotate. the parts of a clock include "hands" and a "dial", but the "dial" cannot pull "hands" to move. the components of the fruit include the "fruit core" and the "peel", but the "peel" cannot pull the "core" to move. "tires" are part of a "car".
relation: bone muscle R2.4
relation: muscle bone R3.10
relation: gear spring R2.4
relation: spring gear R3.10
relation: hands dial R2.4
relation: fruit core peel R2.4
relation: tires car R2.3