The third line is the closing tag.
Now, we scroll down the page a bit. Inside the BODY tag, we see this:
This is quite simple really. What makes sense right off the bat?
Why? Because "write" is a sub-property of document - it's one of the things the document can do. It can write. It can write text to a webpage. There are many properties within the document object. One of the most useful is the one that allows us to manipulate forms, which we will go into in the next installment of this tutorial. For now, just think of the DOM through the analogy used above.