(a) With the aid of suitable diagrams, describe the appearance and formation of any two of the following landforms (i) delta (ii) river capture (iii) waterf...

(a) With the aid of suitable diagrams, describe the appearance and formation of any two of the following landforms 
(i) delta (ii) river capture (iii) waterfall (iv) inselberg

(b) Show one way in which each of the two features in (a) above is of importance to man