What does the div element do in this code?

It groups together the h1 and h3 elementsIt groups together the h3 and p elementsIt groups together the h1 and p elements

It groups together the h3 and p elements.

<html>
<body>
  <h1> Number of unique visitors </h1>
  <div>
   <h3> Today: 117 </h3>
   <p> Last update: 1 min. ago </p>
  </div>
</body>
</html>]]>