<form>
  <h3>Choose your favorite superhero</h3>

  <label for="spiderman">  
    <input type="radio" id="spiderman">
    Spider-man
  </label>

  <label for="superman">
    <input type="radio" id="superman">
    Superman
  </label>

  <label for="batman">
    <input type="radio" id="batman">
    Batman
  </label>

  <button>Submit</button>
</form>
Preview

Hints

<form>
  <fieldset>
    <legend>
      <h3>Choose your favorite superhero</h3>
    </legend>

    <label for="spiderman">
      <input name="superhero" value="spiderman" type="radio" id="spiderman">
      Spider-man
    </label>
    <!-- ...resten... -->
  </fieldset>
  <!-- ... -->
</form>

Choose your favorite superhero