In which areas is waterlogging more likely in the Northern Plains?

Correct answer: Where slope is low, drainage is weak and surface is level

The direct answer is A. Waterlogging means excess water remains on or near the ground because it cannot drain away quickly. Step by step: a nearly level surface gives water little downhill movement; weak drainage prevents rapid removal; rainfall or irrigation then raises the water level and saturates the soil. Option A is correct because all three conditions—low slope, poor drainage, and level land—promote standing water. Option B is wrong because steep mountain slopes usually let water flow away quickly, although local pockets can differ. Option C is wrong because sea cliffs are not a defining feature of the Northern Plains. Option D is wrong because permanent glaciers are absent from ordinary plain areas and do not explain widespread plain waterlogging. Exam cue: flat land plus poor drainage equals higher waterlogging risk.