1. Which of thre following factors causes causes the breaking down of rocks? a. man and animals b. plants c. Temperature d. all of these 2. Which of the following activities of man contributes to the breaking down of rocks? a. fishing b. mining c. Studying d. sky diving 3. It is the breaking down of rocks into fragments. a. erosion b. flooding c. Runoff d. weathering 4. A type of weathering that involves the composition of rocks. a. chemical b. mechanical c. Both a and b d. none of them 5. Which process can bring baout ​