What is the best way to make forms mobile friendly?

I was also hoping that you could advise as to the best way to make forms mobile friendly. Xara has a website variant function and so far the best solution for me seems to be to make a clone of the form and make one a different size and unresponsive. I wondered if there was a simpler way.

Your form is already responsive as far as I could see it. But here's how guide on how to make your forms mobile friendly: https://www.jotform.com/help/322-How-to-make-mobile-friendly-forms-on-JotForm. 

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