Answer:
Great Britain is a parliamentary democracy and a constitutional monarchy, with Queen Elizabeth II as the head of state. The government is made up of elected representatives who form the Cabinet, which is responsible for making and implementing policy. The country has a multi-party system, with the two main parties being the Conservative Party and the Labour Party.
The Russian Federation is a federal semi-presidential republic. The President of Russia is the head of state and holds significant executive power, while the Prime Minister is responsible for managing the government and implementing policy. The Russian political system has a number of political parties, but the dominant party is currently United Russia.
China is a single-party communist state ruled by the Communist Party of China (CPC). The President of China is the head of state, while the Premier is responsible for managing the government and implementing policy. The CPC controls all aspects of the government and the political system is not democratic, as opposition parties are not allowed to participate in elections.