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    				| 1. | Rewrite the following sentences, choosing the right word from those given in brackets : | 
| Answer» 1. (Humus / Regolith) is produced by the decayed organic material, including dead leaves, stems roots, living bacteria, fungi, worms and other organisms. 2. (Weathering / Denudation) refers to the gradual disintegration and decomposition of rocks which lie exposed to the elements of weather. 3. (Young / Mature) soils are those which are undisturbed by erosion or deposition. 4. (Hydration / Carbonation) occurs when the water itself combines chemically with some element or mineral. 5. (Oxidation / Solution) is the chemical process in which some of the minerals are dissolved by the water. | |