Regarding Africa's continent, European nations fail to consider that the Europe's arbitrary post-colonial borders left Africans bunched into countries that don't represent their heritage, a problem that is still present at this days. The nations of the african continent<span> are largely defined not by its peoples heritage but by the follies of European colonialism.</span>
Answer: A i think sorry if its wrong
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Answer: Chinese immigrants were particularly instrumental in building railroads in the American west, and as Chinese laborers grew successful in the United States
Explanation:
I believe the answer is Barbed Wire.
Befor the inventions of barbed wire, the Cattles are let to roam freely across the plains and the owners are required to pay a lot of cowboys to supervise them so they didn't go missing. Witht he invention of barbed wire, they can keep the cattle in a secure place without supervision.