Why was Wegner's hypothesis of continental drift not widely accepted at the time it was proposed What do scientists now think might be a possible cause of continental drift?

Wegener's hypothesis of continental drift was not widely accepted during his time because he could not provide a convincing mechanism for how continents could move across the Earth's surface. His ideas contradicted the prevailing geological theories, and many scientists were skeptical of his lack of evidence for a force driving the drift. Today, scientists understand that continental drift is driven by plate tectonics, where the movement of tectonic plates is caused by convection currents in the Earth's mantle. This mechanism provides a clear explanation for the movement of continents over geological time.