Question

write difference between delta and terrai

Answer 1

Terrain is land with regard to its physical features

Delta is an area which is mouth of river.

Answer 2

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⇛Estuary is an area where salt water of sea mixes with fresh water of rivers. Delta is a low triangular area of alluvial deposits where a river divides before entering a larger body of water. Estuary: Coastal plain estuaries; tectonic estuaries; bar-built estuaries; and fjord estuaries.

Delta is formed by the sediment of the river that is brought by river, whereas those rivers have tidal tendencies form estuary where it meet the sea.