Why was life on reservations so difficult for the Plains tribes?

Plains Indians were unable to hunt buffalo since the majority had been exterminated. Instead, they had to rely on government rations that could be withdrawn at any time for poor behaviour. Since they could not leave their reservations to raid other tribes, there was no way for Plains Indians to increase their wealth.

Explanation:

The Plain Indians were not able to hunt buffalo since much had been exterminated,so they had to rely on government rations that could be introverted at any time for bad behavior.

Explanation:

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b