Here's a breakdown:
* Noun: A word that names a person, place, thing, or idea (e.g., dog, house, happiness, John).
* Pronoun: A word that replaces a noun (e.g., he, she, it, they).
* Verb: A word that describes an action or a state of being (e.g., run, sleep, be).
Let me know if you have any other questions about parts of speech!