What type of pronoun is the word in bold?

THIS is the author’s first book.

interrogative

indefinite

relative

demonstrative

demonstrative

The word "this" is a demonstrative pronoun in the sentence "THIS is the author's first book."

To identify the type of pronoun, you can refer to its function and the context of the sentence. Demonstrative pronouns are used to point out or identify specific people, places, or things. In this case, "this" is used to refer to a specific book that the speaker is indicating or pointing to.

The word "THIS" in the sentence "THIS is the author's first book" is a demonstrative pronoun.