Give short answers to the following questions.
a) Define run-off, stream and river.
b) Name three sections of a river.
c) Give two ways in which waterfalls are made.
d) Describe the formation of flood plain and alluvial fan.
e) How is ox-bow lake formed?
f) What is the difference between a ‘V’ shaped valley and a gorge?
g) How is delta formed?