Learn HTML by Building a Cat Photo App - Step 44

I have tried all effort to create a radio button, but i seem to be having issues with the code so far. This is my code so far, please help me point out my issues. thank you.
The option is to set as indoor.

<html>
  <body>
    <main>
      <h1>CatPhotoApp</h1>
      <section>
        <h2>Cat Photos</h2>
        <!-- TODO: Add link to cat photos -->
        <p>See more <a target="_blank" href="https://freecatphotoapp.com">cat photos</a> in our gallery.</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>
        <h3>Things cats love:</h3>
        <ul>
          <li>cat nip</li>
          <li>laser pointers</li>
          <li>lasagna</li>
        </ul>
        <figure>
          <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/lasagna.jpg" alt="A slice of lasagna on a plate.">
          <figcaption>Cats <em>love</em> lasagna.</figcaption>  
        </figure>
        <h3>Top 3 things cats hate:</h3>
        <ol>
          <li>flea treatment</li>
          <li>thunder</li>
          <li>other cats</li>
        </ol>
        <figure>
          <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/cats.jpg" alt="Five cats looking around a field.">
          <figcaption>Cats <strong>hate</strong> other cats.</figcaption>  
        </figure>
      </section>
      <section>
        <h2>Cat Form</h2>
        <form action="https://freecatphotoapp.com/submit-cat-photo">

<!-- User Editable Region -->

 <input type="radio" Indoor>
          <input type="text" name="catphotourl" placeholder="cat photo URL" required>

<!-- User Editable Region -->

          <button type="submit">Submit</button>
        </form>
      </section>
    </main>
  </body>
</html>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0

Challenge: Learn HTML by Building a Cat Photo App - Step 44

Link to the challenge:

Hello and welcome to the community :smiley:!
Input elements are self-closing and do not require a closing tag. The text comes right after the tag.
Ex:

<input type="checkbox">Submit

Looks like this:
Submit

Thank you so much for the corrections
i really appreciate