<span>Any value given up by not choosing to spend or save the money is the _____ .
Opportunity Cost</span>
Answer:
1) large population centers; (2) monumental architecture and unique art styles; (3) shared communication strategies; (4) systems for administering territories; (5) a complex division of labor; and (6) the division of people into social and economic classes.
Source: Key Components of Civilization - National Geographic Society
Answer:
its either Boston, New York or Philadelphia
