Responsive designs fluidly expand, where as adaptive designs hitch as you expand a browser or viewport. Positioning your designs elements using pixels as X,Y coordinates can cause a site designed for one screen to look weird on another. Use relative units, like percent of the screen, instead of static units like pixels. Positioning your designs elements using pixels as X,Y coordinates can cause a site designed for one screen to look weird on another. Use relative units, like percent of the screen, instead of static units like pixels. Breakpoints allow the layout to change at predefined points, i.e. having three columns on a desktop, but only one column on a mobile device." As screen sizes become smaller, content starts to take up more vertical space and anything below will be pushed down, it's called the flow." Having a lot of elements depending on each other would be difficult to control, therefore wrapping elements in a container keeps it way m...