Soil

Read the following statements and give the appropriate terms
for each of them.
(a) The process of breakdown of rocks by the action of wind,
water, sunlight.
(b) Removal of top soil during heavy rains or strong winds.
(c) Accumulation of wastes in the soil generated by human
activity which alter the features of soil.
(d) The process of movement of water into deeper layers of
soil.