To what extent do the global migration trends reported in sources 7 and 8 corroborate (support) the “laws" Ravenstein created in the 1880s? Which region best reflects Ravenstein's predictions about migration?

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks

answerpeople organize large projects such as levee-building;