What is the most direct cause of seasonality in Peninsular rivers?

Correct answer: Greater dependence on monsoon rainfall

The direct answer is A: greater dependence on monsoon rainfall. Seasonality means that the amount of river water changes during different seasons. Peninsular rivers are generally fed mainly by rain, and most of their rainfall arrives during the seasonal monsoon. During the rainy months, their water level and discharge increase. When the monsoon ends and rainfall becomes low, the flow decreases, so many Peninsular rivers become smaller or partly dry. Option A is correct because it gives the direct physical reason for this seasonal pattern. Option B is wrong because permanent glacial feeding is characteristic of some Himalayan rivers, not the main source of Peninsular rivers. Option C is wrong because rivers do not begin from sea tides; tides are movements of seawater near coasts. Option D is wrong because underground lava flow is not the normal source of river water and does not explain seasonal river discharge. The reasoning is simple: seasonal monsoon rain leads to seasonal water supply, which leads to seasonal river flow. Memory cue: monsoon-dependent rivers are usually seasonal; snowmelt plus rainfall can support perennial flow.