<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container">
<h1>Margin Bottom Utilities</h1>
<p>Margin Bottom utilities:</p>
<div class="mb-0 bg-warning">Margin Bottom 0</div>
<div class="mb-1 bg-warning">Margin Bottom 1</div>
<div class="mb-2 bg-warning">Margin Bottom 2</div>
<div class="mb-3 bg-warning">Margin Bottom 3</div>
<div class="mb-4 bg-warning">Margin Bottom 4</div>
<div class="mb-5 bg-warning">Margin Bottom 5</div>
<div class="mb-auto bg-warning" style="width:150px">Margin Bottom Auto</div>
<br>
<p>Responsive margin bottom utilities. Resize the browser window to see the effect:</p>
<div class="mb-sm-5 bg-warning">Margin Bottom 5 on SM screens</div>
<div class="mb-md-5 bg-warning">Margin Bottom 5 on MD screens</div>