This page is created.
HTML is the base code. The CSS formats and styles an HTML page.
CSS can be inserted inline (using HTML elements), internally (the style attribute), and externally (linking a CSS sheet).
This is used in various ways because sometimes you need to specify on the HTML page itself while the main CSS linked sheet just keeps it consistant.
An ID specifies the specific line. The Class attribute can extend to several elements.
ID is used for a specific line to use in CSS. A Class is used to manage multiple elements with CSS.