Use the AMP version for mobile for faster loading and less memory requirements - but without large images and maps
A responsive design should respond to the screen size or shape in the way the designer intended, but this doesn't give the user the choice to select the features that they want.
Resizeable allows the app designer to give the user some ability to make the decisions about the relative sizes of elements in an app or a web page.
CSS can be used to allow the resize of a elements in Firefox, Chrome and Safarai, but not IE or Edge ( March 2018)
JQuery allows multiple elements to be resized at the same time, and is much more browser compatible.
Resizeable using CSS
Resizeable using input sliders
Resizeable using JQuery
Resizeable Tutorial: Activities
Resizeable Tutorial Discussion