<span>Further reading indicates the Native Americans provided a great deal of ready to eat food (corn, beans, squash, pumpkins, dried meat and fish, acorns, berries, etc.) as they were better farmers than the Europeans up until 20th Century yields.
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Famine is yes a pull factor in cases of needing to go to war but what are you asking exactly?
The US prairies or Great Plains included a large north-south swath of level or slightly rolling grasslands east of the Rockies from central Texas to Manitoba in Canada and included at least parts of Montana, Wyoming, /Colorado and New Mexico, North Dakota, S. Dakota, Nebraska, Kansas and Oklahoma.
Answer: Right choice:
c. He was committed to states' rights and believed that to save the Union concessions must be made to the South.
Explanation:
President James Buchanan tried to preserve the unity of the Union by different means but he wasn´t succesful in assuaging rising tensions North-South. He tried to prevent anti-slavery agitation in the North. He enforced the Fugitive Slave Act. Southern states began to secede in his last months in office, spurred by the victory of Abraham Lincoln in the 1860 presidential election.