How is an oxbow lake formed?
a. an oxbow lake is formed when a lake shrinks due to erosion.
b. an oxbow lake is formed when the wide bend of a river is cut off.
c. an oxbow lake is formed when high concentrations of salt are present in lakes.
d. an oxbow lake is formed when a dam or levee is built on a river.?

The correct option is B

A meander is a curve described by the course of a river, whose sinuosity is pronounced. They are formed more easily in the rivers of the alluvial plains with very little slope. The sediments are usually deposited in the convex part of the meander, advancing the shore, while in the concave, due to the centrifugal force, erosion and the recoil of the shore predominate. The combination of the advance of the shore in the convex parts and the recession in the concaves produces the migration of the channel and, therefore, the development of the meander.

When two curved channels meet due to erosion, the river cuts its way through the area where the currents are opposed and a lake of horseshoe or oxbow lake is formed, since the sediments close the entrance and exit of the old meander, being outside the channel of the river.

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.