Activating the ZapForm plugin will create a page with a form object that looks like this:
The blanks can be filled in and the pre-set entry in the Subject text box can be changed by the user.
The radio button type allows only one item to be selected. (If we had made the type checkbox, then more than one item could be selected.)
After pressing the Send button, the user needs to be told that the email has been sent. Next.