Final answer:
The land policy of the eastern United States did not effectively transfer to protect western environments, this is false. True, acquisition of land was key in early U.S. Indian policy. False, the Border States did not quickly accept Lincoln's emancipation proposals, and the Louisiana Purchase did indeed double the United States territory.
Step-by-step explanation:
The statement regarding the land policy of the eastern United States being transferred to the western territories to quickly protect western environments is false. The westward expansion during the 19th century was more about accommodating the rapid growth in population, the decline in soil fertility in the east, and the various political and economic motivations, including ensuring that British influence did not grow in the west, balancing the urbanization of the northeast, and controlling ports for trade with Asia. This expansionist mindset often came at the cost of the environment and native populations.
Regarding U.S. Indian policy, it is true that the acquisition of land was a central motivating factor. The historical context during this period shows a strong desire for territorial expansion and settlement which often disregarded the rights and territories of Native American tribes.
It is false that the Border States quickly accepted Lincoln's proposals for gradual compensated emancipation and willingly implemented the Thirteenth Amendment. There was in fact a significant amount of resistance to these changes.
Additionally, the Louisiana Purchase did indeed double the size of the United States making the statement in Exercise 11.1.5 true.
Last, it is true that the region of the present-day Southeastern United States was one of the world's independent centers for plant domestication, highlighting the agricultural contributions of Native American civilizations.