What are the four phases of development of geography​

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons

Which of the following statements about wearher along mountain ranges is correct

What is the main source of phosphorus?