Why does Machine Politics emerge? How did Machine Politics expand so rapidly? Help!!! I don't understand!

When a nation depletes its natural resources, it often experiences rapid decline because it:

Which of the following was not an effect of westward expansion? a. native american tribes suffered confinement on reservations. b. native americans learned new techniques of irrigation. c. many native americans died from the spread of disease. d. natural resources were depleted from misuse by white settlers.

What is one way scalawags were significant during the reconstruction in the south?