Explain the code on how to insert an image, a link, and a horizontal rule. Why is it important to know how to do these elements?

A very important code in webpage design is how to insert an image onto your webpage. The coding for this is < img src="file name here" >. Adding a link to your webpage is also important. The coding for that < a href="website here" >. And last but certainly not least is adding a horizontal rule. The coding for this is < hr >.
These codes are important so you can jazz up your page. :)