Description of the Skeleton CSS framework: http://getskeleton.com/ The example web page: http://getskeleton.com/examples/landing/ The source code of CSS file: http://getskeleton.com/dist/css/skeleton.css

In a responsive web page, 3 columns in a row (shown in a large screen) will become 3 rows in small browser screen. Explain the technique used to achieve this responsiveness.

Explain how responsive images are achieved in the example web page.