Answer
a. action of rivers and tides
Work Step by Step
Estuaries are the delicate water bodies where the fresh water from the river and salty water from the sea water meet and mix-up. They are responsible for transporting and mixing the nutrients. The difference in sedimentation of the water of rivers and sea-water, the wind action and the tidal activity allow the trapping and transport of the nutrients. Reefs, deltas and barrier islands protect the estuaries from the ocean forces.
