Geography · Plate Tectonics

A broad segment of the rigid lithosphere that floats on the underlying asthenosphere and moves independently is called a tectonic plate. Which statements correctly relate to Plate Tectonics Theory? I. Melting of polar ice and global sea-level changes. II. It is the widely accepted theory explaining the origin of continents and ocean basins. III. It accounts for the occurrence of earthquakes and volcanic eruptions along plate boundaries. IV. Seasonal melting of river glaciers.