What's wrong with the following HTML markup?

Answer 1

#1 don't write your question on the tag space, instead use the description space.
better like this...
<p>
<span style="font-size: 10px; ">2015</span>
copyright
</p>

Answer 2

@Nomeh Uchenna Gabriel
I think he pasted inside that because of
when you write question you'll see relevant "tag" so he pasted in there 😆

Answer 3

The tags <p> are not closed properly and the style attr is not used in any tag
Maybe you wanted to:
<p style font-size:"10px"> copyright <span>2015 </span></p>

Answer 4

style

Answer 5

and tag