Which pronoun category includes words like 'mine', 'yours', 'his' and 'theirs'?

The correct choice identifies these specific words—'mine', 'yours', 'his', and 'theirs'—as possessive pronouns. This category of pronouns is used to show ownership or possession. For instance, when someone says "That book is mine," it indicates that the book belongs to the speaker. Similarly, "This is yours" indicates that the object belongs to the listener. Possessive pronouns help clarify who owns certain items or has specific relationships, thereby enhancing the clarity of communication.

In contrast, personal pronouns refer to specific people or things and include words like 'I', 'you', 'he', and 'she', which do not indicate possession. Relative pronouns, such as 'who', 'that', or 'which', are used to introduce dependent clauses and connect them to the main clause. Interrogative pronouns, like 'who', 'what', and 'which', are used to ask questions and are not related to possession. Understanding the function of possessive pronouns is crucial for conveying ownership correctly in writing and speaking.