Concept:Each word has a distinct meaning: bate means to restrain, bait means a lure, and bade is the past tense of bid (to say goodbye or command).Explanation:Sentence 1: "bate their curiosity" means hold back curiosity. Correct usage.Sentence 2: "set the bait" means a lure for the leopard. Correct usage.Sentence 3: "bade goodbye" means said goodbye. Correct usage.All three sentences use the words appropriately.Answer:Option A: 1, 2 and 3