The Select (User Role) field is available in every version of Profile Builder.
You can use this field to allow users to choose their User Role.
You can specify the field title, meta-name to be stored in the database, description and what roles to be displayed in the form. You can drag and drop the roles to rearrange them.
Also, you can set whether this field should be required or not.
This is how it looks like in the front-end.