Anytime you need to display a piece of content—like an image with an optional caption, consider using a <figure>.
Use the included .figure , .figure-img and .figure-caption classes to provide some baseline styles for the HTML5 <figure> and <figcaption> elements. Images in figures have no explicit size, so be sure to add the .img-fluid class to your <img> to make it responsive.
<figure class="figure">
<svg class="bd-placeholder-img figure-img img-fluid rounded" width="400" height="300" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 400x300"><title>Placeholder</title><rect width="100%" height="100%" fill="#9e9e9e"/><text x="50%" y="50%" fill="#ececec" dy=".3em">400x300</text></svg>
<figcaption class="figure-caption">A caption for the above image.</figcaption>
</figure>Aligning the figure’s caption is easy with our text utilities.
<figure class="figure">
<svg class="bd-placeholder-img figure-img img-fluid rounded" width="400" height="300" xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="xMidYMid slice" focusable="false" role="img" aria-label="Placeholder: 400x300"><title>Placeholder</title><rect width="100%" height="100%" fill="#9e9e9e"/><text x="50%" y="50%" fill="#ececec" dy=".3em">400x300</text></svg>
<figcaption class="figure-caption text-right">A caption for the above image.</figcaption>
</figure>