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.
(a) Weathering: The process of breaking down of rocks by the action of wind, water and climate.
(b) Soil erosion: A process of depletion of top soil.
(c) Humus: The rotting dead matter in the soil.
(d) Percolation: Seepage of water into the soil.