This document discusses demonstrative pronouns and provides examples of their use based on number (singular or plural) and proximity (contact or no contact). It notes that "that" is used for singular nouns with no contact, "this" is used for singular nouns with contact, "these" is used for plural nouns with contact, and "those" is used for plural nouns with no contact. The document concludes by encouraging the reader to practice using demonstrative pronouns.