Ava had read about continental drift and that it had now become a theory. What information caused the hypothesis of continental drift to become a theory

Continental drift theory

Explanation:

Movement of plates in the lithosphere (plate tectonics) caused the hypothesis of continental drift to become a theory

Alfred Wegener first presented the hypothesis that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locationsWegener thought all the continents were once joined together before breaking up and drifting to their current positionsMost of Wegener's observations about fossils and rocks were correct but he was wrong on a couple of key pointsPlate tectonics is now the widely accepted theory that Earth's crust is fractured into rigid, moving platesIn the 1960's, scientists discovered the plate edges through magnetic surveys of the ocean floor and through the seismic listening networks built to monitor nuclear testingPlate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the coreThe plates act like a hard and rigid shell compared to Earth's mantle and this strong outer layer is called the lithosphereThe lithosphere includes the crust and outer part of the mantle

Active site is where they touch.