Why is the rhine germany's most important river

The Rhine River begins at the Rheinwaldhorn Glacier in the Swiss Alps and flows north and east approximately 820 metres. This river is arguably the most importantwaterway in Germany and is linked by canals to other major rivers in Western Europe.

Rhine river flows over 6 countries n is the busiest route in Germany, is the most important waterway from south to north

Cause of he different elevations  hope this ?

Ithink it is space that makes up 70 percent