2012 · Q71
The riverbank is weakest where the river turns. This is because water
General KnowledgeGeography
- AGets concentrated on the inner bank of the turn, making it denser
- BEffectively bounces off the outer bank as it turns, exerting an extra pressure on the bank
- CFlows faster as it turns
- DReacts more effectively with the bank at a turn
Explanation
At bends, water is flung against the outer bank, eroding it (key: B).