How is a delta created a. by sediments deposited when a glacier melts b. by sediments deposited when a river flowing from mountains empties into an ocean c. by sediments deposited by winds over large areas d. by sediments deposited on either side of the river bank.

ANSWER:

Delta is created by 'sediments deposited when a river flowing from mountains empties into an ocean'.

EXPLANATION:

A 'river delta' is formed when the 'river flows and deposits the sediments' that it carried with itself along its course. This generally happens when the river is entering a large water body which has stagnant water or a 'river empties' into an ocean or a sea. The river at this point loses the capability to carry the sediment and therefore deposits the 'sediment' at the 'mouth of the river'.This sediment starts forming layers which develops in a 'triangular shaped delta'.

980 is the correct answer