Describe how early river valley civilizations innovated to meet their needs. (Be sure to define the need and describe how their innovation addressed the problem ). I

The term “iron curtain” was based on an actual iron curtain that german theaters used to separate the stage from the audience in case of a fire. who or what did the “iron curtain” of the cold war separate? democratic nations from communist nations the soviet union from its allies the united states from europe europe from asia