Totalitarian government is when a single group completely takes over and makes the people subservient to the state (they make all of the rules) and if there was more than one group, opinions may differ and actions may be more diverse, and it wouldn't have total control over the decisions anymore. Ex: Hitler- changed laws to what he saw fit, changed culture, controlled how people were treated, threw Jew's in concentration camps because of a personal bias, etc. He had total control, thus totalitarian gov.
Religion and government, because he wanted them to be separated
A "bad Nile" is a lack of water or too much water, so possible consequences include:
Famine (from crops dying)
Destruction of property (from flood waters)
and much more. However, this type of question normally references something in the text, so I suggest checking that section to see if a specific example was ever given.
Franklin D. Roosevelt was the president who did all of these things.