Please rephrase - the question is unclear.
Mature rivers - Travel slowly Young rivers - Travel fast Old rivers - Travel VeRy SlOwLy Apex :D
A. travel sowly B travel fast C. travel very slowly
Downhill.
the rivers make it difficult to travel across europe
Mississippi
it was easier to travel upstream
it is easier to travel on water.
Uhm... Travel?
yes.
yes.
it made it easier to travel against the current
it made it easier to travel against the current