What's wrong with my code

HTML-CSS
1

Tell us what’s happening:

Your code so far

<!--<link> 
 <href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">-->
<style>
  .red-text {
    color: red;
  }
  
  h2 {
    font-family: Lobster, Monospace;
  }

  p {
    font-size: 16px;
    font-family: Monospace;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>

<p class="red-text">Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
<p class="red-text">Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Android 6.0.1; Mobile; rv:58.0) Gecko/58.0 Firefox/58.0.

Link to the challenge:
https://www.freecodecamp.org/challenges/specify-how-fonts-should-degrade

2

The comment in the first line.

3 
it should be like this for the link html tag

<link> 
with no closing tag

so for your code you need to put it like so 
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
now to put it as a comment do as so 
<!--
<link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
-->

Your welcome regards.
4

Another thing. Why are you giving styling to p and h2 tags when you have already give styling using a class?