The image shows a waterfall in a river that passes through a rocky area. a. What are two ways in which the hydrosphere is interacting with the geosphere in this river? (2 points) b. How is the biosphere interacting with the hydrosphere and geosphere in this river? (2 points) c. Describe the difference between the movement of boulders in this river and the movement of pebbles or sand. (2 points)