What does the existence of Cold Classical objects suggest about parts of the outer solar system?

Answer

Pockets of pristine, original material still exist in stable zones

The existence of Cold Classical objects, which have remained largely unperturbed since the solar system's early days, suggests that pockets of pristine, original material still persist.

What does the existence of Cold Classical objects suggest about parts of the outer solar system?
locationSpaceastronomyobjectsKuiper Belt