Base level is _____.
Athe source from which the stream flows
Bthe lowest point to which a stream can erode its channel
Cany part of the stream that is below sea level
Dthe elevation of a stream’s largest tributary
Athe source from which the stream flows
Bthe lowest point to which a stream can erode its channel
Cany part of the stream that is below sea level
Dthe elevation of a stream’s largest tributary