The words which point out or indicate some noun are called Demonstrative Pronouns.

Examples:

• This is my pen.
• Is that your house?
• These are the children that live in my neighbourhod.
• Those are some fresh fruits.
• Such are the rewards of loyalty.

In the above examples, This, That, These, Those, and Such are demonstrative pronouns as they point out some nouns in their respective sentences.