bootstrap 4 classes for images code example
Example 1: image responsive bootstrap 4
<img class="img-fluid" src="" alt=""> //This will make your image responsive
Example 2: responsive svg with bootstrap
<svg version="1.1" viewBox="0 0 500 500">
<circle fill="#F7941E" stroke="#231F20" stroke-width="10"
cx="250" cy="250" r="200" opacity="0.6" />
</svg>