Which type of government system has a central authority that holds all or nearly all of the power?

You think all professors are uncoordinated, but then you see your social psychology professor make a diving catch down the left-field line at an intramural softball game against the arts department team. you also notice that your professor hits lead-off for the team and is able to score from second base on a ground-out. you maintain your original stereotype of professors as uncoordinated by deciding that this one individual is an exception to the rule because he is a “young professor.” this is an example of

Which entity owns most if the television stations, radio stations, and newspapers in the united states

How did the nazis lead germany to war in europe and, with their collaborators, kill millions—including systematically murdering six million jewish people?