The german explorer alfred wegener proposed that all landforms were once part of a single "supercontinent." what name did he give this supercontinent?

Yo! a girl out ! i will give brainliest! hu one of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.