11. Q:why did asians cross the land bridge to the americas A:they crossed a bridge called beringia, or bering straight. it was created during the ice age when glaciers trapped so much water that the ocean levels dropped. a bridge of land, now called beringia, appeared where the bering straight is now. after that, when the earth grew warm again, glaciers melted and the bridge ﬂooded.
12.Q:What was the ﬁrst crop raised by native American in Mexico? :A Squash.
13.Q:What were the Advantage of living dwellings built into the side of cliffs?
A:The two advantages of living in dwelling built into the side of cliffs were at it was easy to defend and offered…