XHTML: Close Elements
In HTML, certain elements were permitted to omit the end tag such as paragraph. XHTML does not allow end tags to be omitted; all elements must be closed.
Writing elements without end tags are not acceptable:
<p>This is a paragraph
<p>This is another paragraph
The following two terminatedg elements, which have end tags, are acceptable:
<p>This is a paragraph</p>
<p>This is another paragraph</p>
<p>This is a paragraph
combined with another paragraph</p>
