Question

how is delta formed​

Answer 1

When a river reaches a lake or the sea the water slows down and loses the power to carry sediment . The sediment is dropped at the mouth of the river. Some rivers drop so much sediment that waves and tides can't carry it all away. It builds up in layers forming a delta.

Answer 2

hey mate delta is formed by small sand dunes ....

especially in desert

hope it's help u