html input dropdown

HTML
<!DOCTYPE html>
<html>
<body>

<h2>The select Element</h2>

<p>The select element defines a drop-down list:</p>

<form action="/action_page.php">
  <label for="cars">Choose a car:</label>
  <select id="cars" name="cars">
    <option value="volvo">Volvo</option>
    <option value="saab">Saab</option>
    <option value="fiat">Fiat</option>
    <option value="audi">Audi</option>
  </select>
  <input type="submit">
</form>

</body>
</html><!-- Answer to: "html drop down list" -->

<label for="items">Choose an item:</label>

<!-- The value for `for=""` and `id=""` has to be same. -->

<select id="items">
  <option value="item-1">Item 1</option>
  <option value="item-2">Item 2</option>
  <option value="item-3">Item 3</option>
  <option value="item-4">Item 4</option>
</select>
Source