Creating radio buttons and it's labels

Tell us what’s happening:
Describe your issue in detail here.
I am failed to understand where the problems is.

  **Your code so far**

<h2>CatPhotoApp</h2>
<main>
<p>Click here to view more <a href="#">cat photos</a>.</p>

<a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>

<p>Things cats love:</p>
<ul>
  <li>cat nip</li>
  <li>laser pointers</li>
  <li>lasagna</li>
</ul>
<p>Top 3 things cats hate:</p>
<ol>
  <li>flea treatment</li>
  <li>thunder</li>
  <li>other cats</li>
</ol>
<form action="https://www.freecatphotoapp.com/submit-cat-photo">
  <input type="text" placeholder="cat photo URL" required>
  <button type="submit">Submit</button><Br><Br>
<label for="indoor">Indoor 
<input id="indoor" type="radio" name="indoor-outdoor"
</label>
<label for="outdoor">Outdoor 
<input id="outdoor" type="radio" name="indoor-outdoor"
</label>
</form>
</main>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0

Challenge: Create a Set of Radio Buttons

Link to the challenge:

You’re not closing the input elements
<input id="outdoor" type="radio" name="indoor-outdoor"

Notice something is missing at the end?

When this is corrected the test passes

Thanks a lot.

But I heard Input Tag is self closing tag.

Now, it’s working.

Thanks again.