How can I answer that?

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**
<html>
<body>
  <h1>CatPhotoApp</h1>
  <main>
    <section>
      <h2>Cat Photos</h2>
      <!-- TODO: Add link to cat photos -->
      <p>Click here to view more <a target="_blank" href="https://freecatphotoapp.com">cat photos</a>.</p>
      <a href="https://freecatphotoapp.com"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
    </section>
      
    <section>
      <h2>Cat Lists </h2>
      <section><h3>Things cats love</h3>:
      </section>
      
    </section>
  </main>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:101.0) Gecko/20100101 Firefox/101.0

Challenge: Step 18

Link to the challenge:

You have two issues here. First you wrapped new h3 in its own section.

The instructions say:

After the last h2 element of the second section element, add an h3 element with this text:

That is telling you in the existing second section element (the first one has the h2 of “Cat Photos”, the existing second one has an h2 of “Cat Lists”) you should add an h3 element. Don’t create a new section, just add it to the existing section.

The other problem is that the text of that h3 should be “Things cats love:” - not that the colon should be after the h3, it should be part of it.