What is a negative modification that Texans have made on their environment?

the government paid religious orders to provide basic education to native american children on reservations. in the late 19th and early 20th centuries, the bureau of indian affairs (bia) founded additional boarding schools based on the assimilation model of the off-reservation carlisle indian industrial school.

i believe your answer is d)

a system of cooperative federalism emerged, as the powers of the federal government expanded.