What new problem does the huang he present to the chinese? a. it floods in the spring. b. it dries up from overuse. c. its waters have turned yellow. d. its waters have been diverted. (gradpoint) 'l was looking for the answer on other people's question s and found that it could be either "a." or "b." can someone erasure me?

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle