What among the following is a partially enclosed body of water along the coast where freshwater from rivers and streams meets and mixes with salt water from the ocean ?

What among the following is a partially enclosed body of water along the coast where freshwater from rivers and streams meets and mixes with salt water from the ocean ?
[A]Estuary
[B]Ria
[C]Tidal bore
[D]Lagoon

Estuary
An estuary is a partly enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and ocean environments and are subject to both marine influences, such as tides, waves, and the influx of saline water; and riverine influences, such as flows of fresh water and sediment. The inflows of both sea water and fresh water provide high levels of nutrients in both the water column and sediment, making estuaries among the most productive natural habitats in the world.

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