The seismic wave can tell the scientists about the earth's layers.<span />
Were is the rest of the question...I mean were is the so called column
Answer:Many ecosystems can exist in one biome because a biome is just a geographic area where ecosystems are. An ecosystem is the interaction between living and nonliving things.
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Rivers provide water, and a transportation route (before roads and railroads). They can also form a natural boundary or barrier to protect or defend people. Rivers can provide fish and can also make the lands around them very fertile. if they overflow their banks occasionally.
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