Demonstrative pronouns point to specific things or people. They are:
* This
* That
* These
* Those
"All" is a quantifier. It indicates a whole quantity or number.
Here's an example to illustrate the difference:
* Demonstrative pronoun: "This is my favorite book." (This refers to a specific book)
* Quantifier: "All the students passed the test." (All refers to the entire group of students)
Let me know if you have any other pronoun questions!