An Adjective used to point out which person/thing we speak is called Demonstrative Adjective. These adjectives are used to point out or indicate a particular noun or pronoun using the adjectives - This, That, These and Those.
Examples
This pen writes well.
That tree is very big.
These boys are intelligent.
Those men are lazy.
Note: This & These are used to point out persons/things nearby and that & those are used for far away persons/things.
