Which of the words in the sentences is a demonstrative pronoun

Pronouns that point to specific things: this, that, these, and those, as in “This is an apple,” “Those are boys,” or “Take these to the clerk.” The same words are used as demonstrative adjectives when they modify nouns or pronouns: “this apple,” “those boys.”

remember, the goal of an adjective clause is to add more information to a noun or a pronoun. as you can see from the examples above, you can add information by including a longer adjective clause or tighten up a sentence by turning the adjective clause into an adjective phrase.