CBSE Class 7 Answered

As a river enters a plain, it twists and turns forming large bends or meanders. Due to continuous erosion and deposition along the sides of the meander, the ends loop closer, and after a while, cut off from the river to form Ox-bow lakes.

Floodplains are formed when rivers overflow and soil gets deposited on the river banks. The raised banks are called levees.

When a river approaches the sea, its speed decreases and it breaks into a number of streams known as distributaries. Such an area formed from the collection of sediments is a delta.