Question

How did seafloor spreading support Wegner’s theory of continental drift?

Answer 1

Hint: Alfred Wegener suggested that the continents were once joined into a single supercontinent called Pangaea, meaning all of the world. He indicated that long ago, Pangaea split apart and all the continents shifted to their new locations. He called continental drift his theory.

Complete answer:
In the early part of the 20th century, the continental drift theory was established, largely by Alfred Wegener. Wegener said that continents shift on the surface of the Earth and that they were once unified as a single supercontinent. When Wegener was still alive, scientists didn't think the continents were able to move.
Seafloor spreading is a phenomenon that takes place on mid-ocean ridges, where volcanic activity creates fresh oceanic crust and then eventually shifts away from the ridge. In the principle of plate tectonics, seafloor spreading helps explain continental drift. Tensional tension allows cracks to occur in the lithosphere as oceanic plates diverge.
Wegener suggested that, it is untrue, the continents themselves shift. The tectonic plates are the ones that shift. The dissolution of Pangea triggered the spread of the sea floor, which inspired Wegener to include this in favour of his theory of continental drift.

Note: While the data from Wegener was sound, most geologists dismissed his theory of continental drift at the time. There was no way to understand how solid continents could plough through solid oceanic crust, scientists claimed. The theory of Wegener was almost forgotten until scientific developments offered some more proof that the continents had shifted and provided scientists with the means to establish a framework for the drifting continents of Wegener.