Show the Technique for set up responsive image.

 Technique  for set up responsive image:

Create responsive images by adding an .img-responsive class to the <img> tag. The image will then scale nicely to the parent element.The .img-responsive class applies display: block; and max-width: 100%; and height: auto; to the image:

Example

<img class="img-responsive" src="img_maria.jpg" alt="maria">