The question is not complete
B.)The caste system is the correct answer
Competitive exclusion occurs when "<span>a. organisms attempt to fill the same niche" mostly due to the fact that they are competing over the same food source, which is always limited in some way.</span>
As general terms, Indian Territory, the Indian Territories, or Indian country describe an evolving land area set aside by the United States Government for the relocation of Native Americans who held aboriginal title to their land. In general, the tribes ceded land they occupied in exchange for land grants in an area purchased by the United States federal government from Napoleonic France, the Louisiana Purchase. The concept of an Indian Territory was an outcome of the 18th- and 19th-century policy of Indian removal. After the Civil War, the policy of the government was one of assimilation.