That's not what email does. There are websites with surveys that force completion but email is what it is. Even if you managed to send me a form, I hit reply and can type as I please.
You want a web site with the forms as you asked.
Very often, when I send someone an email, my message includes one or two questions. Sometimes, it's important that I get answers to these questions - but it always surprises me when someone replies to my email, but doesn't answer the questions.
I would love it if I could set up the questions in a way, that the person replying can't click on 'SEND' unless they have answered all the questions. Of course there are many forms on websites that do exactly that - but is there any way of incorporating such a form into your email?