Folk culture is more likely to have an anonymous origin and to diffuse slowly through migration, whereas popular culture is more likely to be invented and diffuse rapidly with the use of modern communication.
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.
<span>A tsunami is not caused by tides</span>
Weakened rock on steep slopes that suddenly gives away and falls down is an example of : A. The impact of Gravity.
Gravity will always caused forces that pulled the rock down. Eventually, the rock on steep slopes will be weakened and pulled by the Gravity
hope this helps
A."n<span>ear the Pontic Steppe, eastern Asia Minor, or northern Mesopotamia"</span>