The population of polar bears is steadily declining because of higher temperatures in their native environment. which human activity likely contributed the most to this change? poaching high use of fossil fuels pollution of rivers and lakes logging

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.