Eastern Europe & the (former) Soviet Union transitioned to a:
Market-based economy.
Shipping technologies and cultures were more readily shared
Sound wave is a pressure caused by the vibration of something in a medium that transfers anergy, like air.
U-a representative democracy. It is a government by the people, because the president and members of Congress are elected.
M- is a federal republic. It is a federation of states.
C - runs a government that is a democracy with a prime minister. Also known as parliamentary democracy.
G - is an independent nation ran by a prime minister.
