[Scenario 1] Recent studies show that historically, the following text describes a geological theory.

Plate tectonics is a scientific theory that explains the large-scale movements of Earth's lithosphere. The model builds on the concept of continental drift, an idea developed during the first decades of the 20th century. The geoscientific community accepted plate-tectonic theory after seafloor spreading was validated in the late 1950s and early 1960s. The lithosphere, which is the rigid outermost shell of a planet (the crust and upper mantle), is broken into tectonic plates.