Match the following term:
(1) waterfall
(2) a system under which foreign governments take control of an area for political and/or economic purposes
(3) steep cliff or slope usually caused by faulting or erosion
(4) physical features of a place or region
(5) stream that flows into a larger stream or body of water
(6) plateau
(a) cataract
(b) topography
(c) veldt
(d) tributary
(e) colonization
(f) escarpment