Final answer:
The word 'who' in the sentence 'Who goes there?' is an example of an interrogative pronoun, which is used to ask questions.
Step-by-step explanation:
The word 'who' in the sentence 'Who goes there?' is an example of an interrogative pronoun. Interrogative pronouns are used to ask questions and gather information. They typically introduce a question and are used to inquire about the identity, what or which thing, or which person of the subject.
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