Answer:
California did not have the first gold rush in American history. ...
The Gold Rush was the largest mass migration in U.S. history. ...
The Gold Rush attracted immigrants from around the world. ...
The Gold Rush was a male-dominated event. ...
Early sections of San Francisco were built out of ships abandoned by prospectors.
Explanation:
THE ANSWER IS RAILROADS!!
The answer that fits the blank above is the term COMPETENT LONERS. This is one of the classification of the six pathways in exiting divorce developed by E. Mavis Hetherington. The competent loners comprises 10 percent of the divorced group who are having a successful career and are living an active social life, though they still choose to not share their personal lives with any other.
This is probably because scientific journals get cross-referenced and peer-reviewed by other mainstream scientific organizations whereas a regular webpage can tell you just about anything without anything to back it up. Their credibility isn't as high.
Checks and balances refers to the specific powers held by each branch of government in order to both invoke their own branches power while also making sure that other branches are not abusing their power. The statement “avoiding the exercise of the powers of one department to encroach upon another” refers to this checks and balances system most clearly, in that it mentions directly that the powers of one branch should not exceed that of another nor should one branch be allowed to abuse their power, the checks and balances system insures that does not happen.