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.
What role did nationalism play in causing ww1?<span>It can also lead them to think that they will surely win any war because of their superiority. Second, nationalism helped lead to WWI because it caused conflict. Archduke Franz Ferdinand was assassinated because of nationalism. ... Thus, both nationalism and imperialism were important factors in bringing WWI about.hope i helped
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The answer is 4 ......................................................................
Answer:
hmmm lets see............
Explanation:
B. Russia became a major exporter of grain after 2001