1. how did the native americans get to north and south america?

The land bridge between asia and america

Explanation:

In the ice age, the cavemen moved out of Africa and settled around the world. Some crossed a land bridge between Asia and America, becoming the first native americans

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

answer; i do believe that the employee must do the adjusting;