Used to point out specific nouns by indicating their position in space or time
Demonstrative Adjectives modify nouns by indicating which person or thing is being referred to, showing their relative distance from the speaker.
Function: To specify particular nouns and make clear which ones are being discussed.
Use your hands to visualize distance: hold one hand close for this/these and point farther away for that/those.
For time references, imagine a timeline: this/these for present/near future, that/those for past.
If the word is immediately followed by a noun, it's a demonstrative adjective. If it stands alone, it's a pronoun.