This Is A Heading , And Is Centered

This is the first paragraph. Paragraph commands create a space between lines of text. You do not have to close a paragraph .
This is a line break. A line break creates a new line with no space.

Above is the HR command, which creates a Horizontal Rule.
You can also change the color of the Horizontal rule, as shown below.

Closing section of the page, can be used for copyright and contact information.