Answer: The sentence that combines the two sentences with an appositive phrase is the last one: "In 1903, two brothers, Orville and Wilbur Wright, made history by flying an airplane at Kitty Hawk".
Step-by-step explanation: An appositive phrase is a noun phrase that is used to rename another noun or noun phrase which is beside the appositive. Appositive phases can be essential or nonessential. While essential appositive phrases are not separated from the rest of the sentence, nonessential appositive phrases are moved apart from the other elements in the sentence because they are found between commas. In the sentence "In 1903, two brothers, Orville and Wilbur Wright, made history by flying an airplane at Kitty Hawk" the appositive phrase is "Orville and Wilbur Wright" since it is renaming and identifying "two brothers". Moreover, it is a nonessential appositive phrase because it is separated from the rest of the sentence.