question: frog:crops
choices.label: A B C D
choices.text: lawyer:defendant trees:city contract:buyer air:health
explanation: "crops" are protected by "frogs", which are creatures of nature. the "lawyer" provides legal services for the "defendant" and the plaintiff, but the "lawyer" is a profession. "cities" are protected by "trees", which are creatures of nature. the "contract" provides legal protection for the "buyer" and the "seller", but the "contract" is a man-made object. good "air" quality is good for "health".
relation: frog crops R3.10
relation: trees city R3.10
relation: air health R3.10