Final answer:
Nouns, pronouns, and proper nouns help to identify objects, people, or important content.
Step-by-step explanation:
The three words that help to identify objects, people, or important content are nouns, pronouns, and proper nouns. Nouns are words that represent a person, place, thing, or idea. Pronouns are words used in place of nouns to avoid repetition. Proper nouns are specific names of people, places, or things.