Why is the following code for a paragraph incorrect?
<p First Paragraph</p>
<p First Paragraph</p> should be <p>First Paragraph</p>
<p>First Paragraph</p>
First Paragraph should be inside a <span>
First Paragraph
<span>
<p> should be <pre>
<p>
<pre>
<p> should be <h1>
<h1>