MCQOPTIONS
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				| 1. | 
                                    Decaying .vegetation produces organic acids which causes a breakdown of minerals. This is : | 
                            
| A. | physical weathering | 
| B. | chemical weathering | 
| C. | both (a) and (b) | 
| D. | chemical erosion | 
| Answer» C. both (a) and (b) | |