</!-->
<h1>Hello World</h1>
-->
<h2>CatPhotoApp</h2>
</!-->
<h3>Hello Paragraph</h3>
-->
It wont go next to the challenge.
</!-->
<h1>Hello World</h1>
-->
<h2>CatPhotoApp</h2>
</!-->
<h3>Hello Paragraph</h3>
-->
It wont go next to the challenge.
Comments start with <!--
and end with -->
Replace </!-->
with <!--
on both the places.