Why individual form tags for each radio button?

Tell us what’s happening:

Hi, just wondering why each radio button option needs to be its own form. Couldn’t the two radio buttons with their labels be nested within one form?

Your code so far

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

<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>

<p>Things cats love:</p>
  <li>cat nip</li>
  <li>laser pointers</li>
<p>Top 3 things cats hate:</p>
  <li>flea treatment</li>
  <li>other cats</li>
<form action="/submit-cat-photo">
  <input type="text" placeholder="cat photo URL" required>
  <button type="submit">Submit</button>
  <label for="Indoor">
   <input type="radio" name="indoor-outdoor">Indoor
  <label for="Outdoor">
  <input type="radio" name="indoor-outdoor">Outdoor


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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.36.

Challenge: Create a Set of Radio Buttons

Link to the challenge:

They do not. What makes you think they do?