<!DOCTYPE html>
<html>
<head>
<title>jQuery DOM Manipulation</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
<div id="container">
<p>Initial Paragraph</p>
</div>
<button id="add-content">Add Content</button>
<script>
$(document).ready(function(){
$("#add-content").click(function(){
$("#container").append("<p>New Paragraph</p>");
});
});
</script>
</body>
</html>