Melon is a direct object because it comes after the verb and someone or something is not receiving it. Subject+verb+who or what=direct object
I believe it is direct. Since, "a melon" and "peaches" are defined in the WHAT section.
In the sentence, "Buy a melon and some peaches at the store," the underlined word "melon" is a direct object because it directly receives the action of the verb "buy." The correct answer is option A. direct object.
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