How do you nest an existing input element within a form element?

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

  **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>
<c>
</main>
<form action="https://www.freecatphotoapp.com/submit-cat-photo" "catphotoURL-form-data">
</form input type=text placeholder</form>
form action="/submit-cat-photo"
<form action>=cat photo URL "https://www.freecatphotoapp.com/submit-cat-photo."<input></form>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Safari/605.1.15

Challenge: Create a Form Element

Link to the challenge:

how to nest an existing input element within a form element?