Theirs letter a. I think that’s the answer.
The answer would be D. <span>they needed the bison for food.
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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.
Answer:
A. An aerial unit consisting of two or more flights of aircraft and the personnel required to fly them.
Because at that time, we still do not have technology such as Television and social media.
Because of this, the only way for us to obtain political influence and favorability among the people (which is needed to become a president) is by first making connection in lower office such as Governors or senators.
