Does anyone know how to create a scrolling box on forms?

Site URL: https://www.joinwavelength.com/affiliate-signup

I'm trying to create a scrolling box in my form with terms and conditions in it, followed by a checkbox where someone checks "I agree."

Right now, I'm getting around this by having a text box filled with the terms and conditions as placeholder text. However, of course, if someone typed anything in the box, the terms and conditions would vanish.

Is there a way to put the terms and conditions as the description for the following block (which is a checkbox), but then format it so it's a scrolling block, rather than an extremely long piece of stagnant text.