The correct answer is "this, that, these, those". These four words are demonstrative pronouns because they are used to point out specific people, places, or things. They indicate whether something is close or far in distance or time. For example, "this" is used to refer to something close to the speaker, while "that" is used to refer to something farther away. "These" is used for multiple things close to the speaker, and "those" is used for multiple things farther away.