[BirdOPrey5]

You don't usually edit the page-

In Admin CP there is "Human Verification Manager" Under the "Settings" side-menu.

You enable "Question and Answer" and setup one or more questions (and answers) and it will automatically show.

In the days before Human Verification was standard some admins would go to "Add New User Profile Field" (also in Admin CP) and setup a custom field that is required on registration and set it up so that a user had to answer the question in a way that matches a regular expression to get registered- kind of a "poor mans" human verify.