Here's why:
* Pronouns are words that stand in for nouns. They avoid repetition and make language more concise.
* Examples: "He," "she," "it," "they," "we," "you," "I," "this," "that," "these," "those," "mine," "yours," "his," "hers," "its," "ours," "theirs."
Let me know if you'd like to know more about pronouns or other parts of speech!