Articles introduces a noun.
Articles + noun = noun phrase
Articles + noun = noun phrase
Noun- Cat
Pronoun- She
Adjective- She is a girl
Verb- The cat is sleeping
Adverb- The cat look nicely
Preposition- The cat sat on the floor
Conjuctions- The cat is lovely but she doesn't like cuddles
Interjections- Wow! She atea lot
Articles- A cat on the floor.