Here's why:
* Interrogative words are used to ask questions. These include:
* Who: Refers to people.
* Whom: Used as the object of a verb or preposition.
* Whose: Shows possession.
* What: Refers to things or ideas.
* Which: Refers to a specific thing or person from a group.
* When: Refers to time.
* Where: Refers to place.
* Why: Refers to reason.
* How: Refers to manner or method.
* Nouns are words that name people, places, things, or ideas.
While interrogative words are used in questions, they function as different parts of speech depending on their role in the sentence. They are not nouns themselves.
Example:
* Who is coming to the party? (Who is the subject of the sentence and acts as a pronoun.)
* What did you eat for lunch? (What is the object of the verb "eat" and acts as a pronoun.)
* Where do you live? (Where is an adverb of place.)
Let me know if you have any other grammar questions!