This video will explain the differences between radios and checkboxes, when you would use one over the other and how to set the available and default options for each.

Radio Buttons

Next, let's add some radio buttons.
Now, before I add these, I want to clarify Radios and Checkboxes. Radios are used when the user may only select one option, while Checkboxes are used when the user may select multiple options.