What are Earthworks?
a artistic pieces that involve materials from nature
b. artistic pieces that involve preserving an area in danger
C. artistic pieces that involve raw materials found at the site of
d. natural artistic pieces formed without human influence
Please select the best answer from the choices provided

stone age, iron age, olden days, prehistory

explanation:

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stan bts

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 1803. the concept of an indian territory was an outcome of the 18th- and 19th-century policy of  indian removal. after the  civil war(1861–1865), the policy of the government was one of  assimilation.