Moldavia changed its name to Moldova Moldavia changed its name to Moldova. The countries of Czechoslovakia and Yugoslavia each broke into multiple countries and, because of the diverse ethnic populations, organized around the concept of nation-states. (See Section 2.2. 6 "Nation-States and Devolution" for a discussion of nation-states.!! Hope u have a great day
Europe is not a typically dry place (unlike for exampe Mesopotamia) so it does not need rivers for irrigation.
Instead, rivers are needed more for transport - they have served as a means of communication and for the exchange of goods.
For example, Danube allowed a big-scale trade between the cities lying on it: Vienna, Budapest and Bratislava.
Convection in Earth's mantle is what is causing Earth's plates to move continuously, although very slowly. A couple of hundreds of years ago, Earth didn't look the same as it does today - continents were farther apart, and they are growing closer and closer with each day, although it is an extremely slow process.
