How to take notes in Microsoft Word 2016?

Question

Word

I am writing an article and I need to format the notes in the same way as it is usually done in articles under the regulations. I mean the notes at the bottom of the page, in which explanations are usually made or the source is indicated.
Here's an example:
Another example:
Example 3:

How do I make these notes separated by a line at the bottom of the page in these examples where explanations are given?