How does water behavior change from Bhabar to Terai?

Correct answer: Water sinks in Bhabar and appears near the surface in Terai

The direct answer is A. Bhabar contains coarse, porous pebbles and sediments at the foothills, so streams often sink into the ground. Farther south, the Terai has finer, less porous material; the underground water reappears near the surface, making the land wet and marshy. Thus the exact sequence is: Bhabar—water disappears underground; Terai—water comes back near the surface. B is impossible because tides and coral belong to coastal marine environments, not these Himalayan foothill belts. C is wrong because glaciers and lava do not describe the normal Bhabar–Terai contrast. D is wrong because Terai is often wet, not completely dry. Memory cue: “Bhabar absorbs, Terai returns.”