<span> It affected Africa by the overwhelming impact on Africa of its involvement in the creation of this modern world was negative. The continent experienced the loss of a significant part of its able-bodied population, which played a part in the social and political weakening of its societies that left them open, in the nineteenth century, to colonial domination and exploitation.
I hope that helps my dudes and dudettes!</span>
Answer:
The steel industry made possible the expansion of railroads given that the tracks are made of steel. The railroad companies were the biggest customers of the steel industry because thousands of miles of steel track were laid to connect all areas of the United States.
1 they started going further north in search of land (no mass)
2 there was a land bridge that connected Alaska and Russia
3 because we figured out how to grow food that was edible and didn’t kill or harm us