The answer to your question is: D. rainfall and ocean waves.
Looking at both figures shows that rain and the waves have changed the terrain.
Answer:
The run area of this river covers the area of Phuntsholing (in Bhutan), Jaigaon( Indian side border), Dalsingpara and Jaldapara National Park. Its tributaries are, Ghargharia river meets with Torsa in the Tufanganj subdivision, near Deocharai.
As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.