Why does excessive monsoon rainfall create flood conditions?

Correct answer: Because water can rise quickly in rivers and low-lying areas

The direct answer is A: water can rise quickly in rivers and low-lying areas. Heavy monsoon rain supplies more water than soil, drains, and river channels can absorb or carry at that time. Some water flows over the surface into streams and rivers; this is called surface runoff. River discharge rises, banks may be overtopped, and water spreads into nearby low land. Thus excessive rainfall can create flood conditions. Option A is correct because it explains the direct chain from heavy rain to rising water. Option B is wrong because rainfall generally adds water to the ground and surface, rather than removing it. Option C is wrong because clouds do not physically block rivers; rain from clouds may increase river flow. Option D is wrong because the sea does not always freeze during monsoon. Memory cue: heavy rain plus fast runoff plus limited river capacity can cause flooding.