Learn HTML Forms by Building a Registration Form - Step 37

I am stuck here

  **Your code so far**
/* file: index.html */
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Registration Form</title>
  <link rel="stylesheet" href="styles.css" />
</head>
<body>
  <h1>Registration Form</h1>
  <p>Please fill out this form with the required information</p>
  <form action='https://register-demo.freecodecamp.org'>
    <fieldset>
      <label for="first-name">Enter Your First Name: <input id="first-name" type="text" required /></label>
      <label for="last-name">Enter Your Last Name: <input id="last-name" type="text" required /></label>
      <label for="email">Enter Your Email: <input id="email" type="email" required /></label>
      <label for="new-password">Create a New Password: <input id="new-password" type="password" pattern="[a-z0-5]{8,}" required /></label>
    </fieldset>
    <fieldset>
      <label for="personal-account"><input id="personal-account" type="radio" name="account-type" /> Personal Account</label>
      <label for="business-account"><input id="business-account" type="radio" name="account-type" /> Business Account</label>
      <label for="terms-and-conditions">
        <input id="terms-and-conditions" type="checkbox" required /> I accept the <a href="https://www.freecodecamp.org/news/terms-of-service/">terms and conditions</a>
      </label>
    </fieldset>
    <fieldset>
      <label for="profile-picture">Upload a profile picture: <input type="file" id="profile-picture"/></label>
      <label for="age">Input your age (years): <input type="number" min="13" max="120" id="age"/></label>
      <label>How did you hear about us?
        <select for="referrer">
          <option value="" id="referrer">(select one)</option>
          <option value="1" id="referrer">freeCodeCamp News</option>
          <option value="2" id="referrer">freeCodeCamp YouTube Channel</option>
          <option value="3" id="referrer">freeCodeCamp Forum</option>
          <option value="4" id="referrer">Other</option> 
        </select>
      </label>
      <label for="bio">Provide a bio:
        <textarea><input id="bio" /></textarea>
      </label>
    </fieldset>
    <input type="submit" value="Submit" />
  </form>
</body>
</html>
/* file: styles.css */
body {
width: 100%;
height: 100vh;
margin: 0;
background-color: #1b1b32;
color: #f5f6f7;
}

label {
display: block;
margin: 0.5rem 0;
}

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Challenge: Learn HTML Forms by Building a Registration Form - Step 37

Link to the challenge:

recall that the ‘for’ attribute is to be used inside the label tag, not the select tag.
Also the id “referrer” should be unique, so which of these lines should you be placing the id in?