Well, she did ask for the long explanation. Problem is, he's quickly reaching the end of his knowledge of the entire subject. He rubs his neck a little.

"There were large crystal structures that pulled Aether up from the earth. It was prolonged exposure to these throughout the generations that would alter someone's own aether enough that they resonated with an element. Eight crystals for the eight elements."

Thank the Founder for Vivians history lessons.