The answer to question one is C. You must report on the importance of the city, so a, b, and d can be ruled out.
The main thing that allowed Russia the ability to fight for so long was it's size. Invading armies would quickly grow tired and many would die in the harsh Russian winters.
George H. W. Bush committed US troops to fight in the Persian Gulf War in order to defeat the Iraqi army.
The Persian Gulf War was a result of Iraq, under the leadership of Saddam Hussein, invading the neighboring country of Kuwait. The United States and United Nations saw this as an act of aggression by Iraq. So both the United Nations and the US sent troops. These two combined forces easily defeated the Iraqi army.
The advantages of a bicameral legislature include stability, more varied representation and the passing of quality legislation. The disadvantages include deadlock and unequal representation. A majority of the countries in the world have bicameral legislatures.