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">
<img data-src="holder.js/400x300" class="figure-img img-fluid rounded" alt="A generic square placeholder image with rounded corners in a figure.">
<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">
<img data-src="holder.js/400x300" class="figure-img img-fluid rounded" alt="A generic square placeholder image with rounded corners in a figure.">
<figcaption class="figure-caption text-right">A caption for the above image.</figcaption>
</figure>