Final answer:
WW II technology such as sonar used for seafloor mapping confirmed the Pangea theory by revealing mid-oceanic ridges, supporting the hypothesis of continental drift proposed by Alfred Wegener.
Step-by-step explanation:
The technology developed during WW II that helped substantiate the Pangea theory was the technology of seafloor mapping. This mapping was made possible through advances in sonar technology, which had initially been developed to detect submarines. After the war, this technology was used to map the ocean floor, leading to the discovery of the mid-oceanic ridges and supporting evidence for the mechanism of seafloor spreading. This, in turn, helped confirm the hypothesis of continental drift that had been proposed by Alfred Wegener decades earlier.