Rivers provided food and fresh water, as well as fertile soil that would be suitable for growing basic crops.
The correct answers are:
<em>C) glaciers;</em>
<em>D) rivers;</em>
The glaciers, with their massiveness, sheer force and weight, are able to break down both, big and small parts of the rocks, thus eroding them. Considering that the glaciers are also moving, though slowly, they are transporting the eroded material over shorter or longer distance, depending on the length of the glacier itself.
The rivers, with their force and also with their chemical composition, manage to erode the rocks little by little, and than transport the eroded sediment. The transportation distance depends on the length of the river, as well as its speed.
It destroyed the Russian economy, but freed many nations that were behind its Iron Curtain. But thanks to Vladimir Putin, the Russian economy is doing better than it has been in many years. Oh, it also "ended" the Cold War.
El límite entre dos cuencas se denomina como una separación de drenaje o límite de cuenca hidrográfica. Componentes de vertiente de drenaje.