Question

what is a delta, how is it formed and the importance of delta​

Answer 1

Delta is a manmade structure or a restriction to the excess of water preventing floods

it provides water for irrigation and also restricts excess of water thus preventing floods

Answer 2

Answer:

A delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment . Deltas are important to human activities, fish and wildlife lay in their characteristic highly fertile soil and dense, diverse vegetation.

Explanation: