What word describes what people do when they spread out and live in almost every land area of the world

Completar fill in the blanks with words from the list based on the panorama cultural video.

Which environmental change allowed people to travel by land between asia and north america a.human apaption to arctic environments b.the introduction to horses to north america c.the formation of ice sheets on land d.a rise in ocean temperatures

Drag and drop the reasons for widespread discontent around the world in the early 1900s.