C. Separation of powers although I guess it also ties in with checks and balances and the branches of the government
<span>People moved from large cities in the East to settle in the Western Territories.--new transportation and territories open up with cheap land drew people west.
Western migration eased the crowding of Northeastern cities and provided a group of people to farm and provide food for the growing industrial centers through the North and Midwest. Railroad transportation allowed for easier travel to the West as well as roads and canals. </span>
Humans need to eat and drink in order to survive, therefore it against natural law to deprive oneself of food and water, as natural law says that species must survive.
