Learn HTML by Building a Cat Photo App - Step 8

Tell us what’s happening:
Describe your issue in detail here.
I am on step 8, needing to add an attribute. I don’t understand and can’t get past this step

  **Your code so far**
<html>
<body>
  <h1>CatPhotoApp</h1>
  <main>
    <h2>Cat Photos</h2>
    <!-- TODO: Add link to cat photos -->
    <p>Click here to view more cat photos.</p>
    <img> 
    <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg">.
  </main>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36

Challenge: Learn HTML by Building a Cat Photo App - Step 8

Link to the challenge: