Question

Sudden descent of water in bed of river
Flat plain formed by river deposited during time of flood

Answer 1

Answer:

THERE YOU GO MATE

The abrupt drop in a river bed causes a waterfall. River water normally flows from higher area to a lower area. The terrain through which the river flows may be uneven with sudden sharp drop in the level, causing water to flow down such steep drop, with force. This causes waterfalls.

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