Here's why:
* Pronouns replace nouns. They stand in for people, places, or things already mentioned. Common pronouns include he, she, it, they, him, her, them, etc.
* "There" indicates a place. It tells you where something is located.
Examples:
* Pronoun: "The cat is sleeping. It is very cute." (It replaces "the cat")
* Adverb: "There is a book on the table." ("There" indicates the location of the book)
Sometimes "there" can be part of a phrase that functions as a pronoun, such as "there are" or "there is." These phrases act as a placeholder for the actual subject of the sentence.
Example:
* "There are five apples in the basket." ("There are" acts as a placeholder for the subject "five apples")