A pronoun is a part of speech that is used to replace a noun in a sentence. It makes reference to a noun that has previously been mentioned.
Please note that your question is incomplete,therefore, i would give you a general overview that should help you arrive at the correct answer.
Examples of pronoun include "She is sleeping". The word She is the pronoun as it replaces the name of the girl (noun). "The ball is mine". Here, the speaker is showing possession by claiming ownership of the ball.
Types of pronouns include: possessive, relative, reflexive, interogative pronoun, etc.