Answer:
the source is the starting point of a river.
It is important to preserve our cultural heritage, because it keeps our integrity as a people. The importance of intangible cultural heritage is not the cultural manifestation itself but rather the wealth of knowledge and skills that is transmitted through it from one generation to the next.
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Without precipitation, there will be no enough water for your daily uses such as water for drinking, agriculture and so on. Air currents also have an effect on us as we rely the air currents in travelling in the bodies of water. Plus, air curents have an effect on the weather too.