It also has to do with the fact that different computers use different computer characters to recognize carriage returns. Now you might be asking yourself where you issue this command. Now for clarity's sake, we're displaying everything in this document at size 4. So if you don't notice a size change, that's okay. You'll notice the change in your document.
Sizes are rather strange.
The smallest size is 1 and the largest size is 7. You'll have to experiment with the sizes before you'll probably know which size to use where. Okay, I'm seeing Black text on a Gray background. You'll notice that after you reload the HTML page from your web browser the background color has changed to White, and the text has remained Black. Now we know that most word processors can add images to documents, but for the sake of other computers that are different than yours, HTML has to keep your images separate from the HTML document.