question: tree roots:root carving
choices.label: A B C D
choices.text: paper:paper cut clay:porcelain bamboo:bamboo raft cement:inkstone
explanation: "root carvings" can be carved by "tree roots", and "root carvings" are works of art. "paper cut" can be cut from "paper", and "paper cut" is a work of art. "clay" is the raw material for making pottery, not for "porcelain", which is mainly fired from porcelain stone, kaolin, quartz stone, mullite, etc. "bamboo rafts" can be made of "bamboo", but "bamboo rafts" are not works of art. the raw materials of an "inkstone" are stone, crystal or bamboo, not "cement".
relation: tree roots root carving R3.7
relation: paper paper cut R3.7