Ans : b)
Pronoun is a word that is used instead of Nouns ( Common/ Proper). which helps to reduce the appearance of Noun in the para.

Definition of a Pronoun:
A pronoun is a word that is used in place of a noun in a sentence. It is a part of speech that functions to avoid repetition and make sentences more concise and clear. Pronouns help to refer to people, places, things, or ideas without repeating the nouns over and over again.

Explanation:
Pronouns serve as a substitute for nouns. They are used to replace specific nouns or noun phrases in a sentence. By using pronouns, we can avoid repeating the same noun multiple times, which makes our sentences more fluent and less repetitive.

For example, instead of saying "John went to the store, and then John bought some groceries," we can use pronouns to make it more concise and natural: "John went to the store, and then he bought some groceries." In this sentence, the pronoun "he" replaces the noun "John" and makes the sentence flow better.

Types of Pronouns:
1. Personal Pronouns: These pronouns refer to specific people or things. They include words like I, you, he, she, it, we, and they.
2. Demonstrative Pronouns: These pronouns point to specific people, places, or things. Examples include this, that, these, and those.
3. Possessive Pronouns: These pronouns show ownership or possession. Examples include mine, yours, his, hers, ours, and theirs.
4. Reflexive Pronouns: These pronouns end in -self or -selves and are used when the subject and object of a sentence are the same. Examples include myself, yourself, himself, herself, itself, ourselves, yourselves, and themselves.
5. Interrogative Pronouns: These pronouns are used to ask questions. Examples include who, whom, whose, which, and what.
6. Relative Pronouns: These pronouns introduce relative clauses and connect them to the main clause. Examples include who, whom, whose, which, and that.
7. Indefinite Pronouns: These pronouns refer to nonspecific people or things. Examples include someone, anyone, everyone, something, anything, everything, and nothing.

Conclusion:
Pronouns play an important role in language by allowing us to refer to nouns without repeating them. They make sentences more concise, fluent, and easier to understand. By using pronouns effectively, we can enhance the clarity and flow of our communication.