HTML automatically adds an extra blank line before and after a heading.
<hr /> tag breaks the current text flow and makes a very fine shaded horizontal line such as is used throughout this page. No closing tag is needed. You can also control the thickness, length and alignment of the line, by combining Width, Size, Align, Noshade attributes.
HTML automatically addes an extra blank line before and after a paragraph.
The line break tag
used when you want to end a line, but don't want to start a new paragraph.