I would say the Louisiana purchase because it doubled the size of the U.S.
an open system can be affected by the outside environment.
it has flows of information, energy, and/or matter between the system and its environment, and the system adapts to the exchange.
hope i helped! good luck.
Can you show the options?
I believe the answer would be The Romans developed their city-states from the Etruscans. The Romans developed their Roman civilization.
The Mita System was important to the Incan Empire because:
B. it allowed the government to collect taxes in the form of physical labor
The Mita labor System resulted in roads and buildings throughout the Incan Empire.
If that were true, then the first thing that would happen when the sun disappeared is that Earth, along with all the other planets, would go flying off into space. It would be complete and utter chaos in our solar system.
