he word "dress" is a noun because it represents an object, which is a thing. A noun is a word used to name people, places, things, or ideas. "Bought" is a verb that describes an action. "New" is an adjective modifying "dress." "For" is a preposition showing a relationship. Another noun in the sentence is "party," but since the question asks for a single noun, "dress" is the correct answer. Recognizing nouns is essential for writing clear and grammatically correct sentences.