Final answer:
The subject of a sentence is a noun. It represents the main element in a sentence that the rest of the sentence revolves around.
Step-by-step explanation:
The subject of a sentence is usually a noun. A noun is a word that represents a person, place, thing, or idea. It is typically the main element in a sentence that the rest of the sentence revolves around. For example, in the sentence 'John plays soccer,' 'John' is the subject because the sentence is mainly about him.
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