Final answer:
The acquisition of land was a central goal in early U.S. Indian policy, making that statement true. Sir Walter Raleigh did attempt to colonize Roanoke, which also makes that statement true. However, the establishment of New Netherland by the Dutch was for trade rather than for building a large agricultural settlement for export crops, so that statement is false.
Step-by-step explanation:
The notion that the acquisition of land was the most important motivating factor in the formulation of early U.S. Indian policy is indeed true. The early policies were greatly influenced by the desire of the United States to expand its territory and secure lands for settlement and economic development. This drive for land acquisition often resulted in the displacement and unfair treatment of Native American tribes. Notably, policies such as the Indian Removal Act of 1830 specifically facilitated the removal of Native Americans from their ancestral lands to make room for American settlers.
Sir Walter Raleigh is historically recognized as the individual who attempted to establish the Roanoke Colony, which became known as the "Lost Colony" due to its mysterious disappearance. Therefore, the statement that Sir Walter Raleigh was behind the Roanoke colonization attempt is true.
The founding of New Netherland by the Dutch was not primarily for the purpose of establishing a large agricultural settlement for export crops. The primary aim was to engage in fur trade and to set up a trade network; hence, the statement regarding the Dutch's intention is false.