Final answer:
West Germany was a Federal Republic (Parliamentary Democracy) after World War II, contrasting with the Communist government of East Germany until their reunification in 1990.
Step-by-step explanation:
After World War II, West Germany, officially known as the Federal Republic of Germany, adopted a form of government known as a Federal Republic (Parliamentary Democracy). This government structure entails a parliamentary system where the political power is vested in a legislature and a chancellor who leads the government. Following the division of Germany, East Germany became a Communist state, while West Germany fostered a capitalist democracy until the reunification of the two states in 1990.