Acoastal inlet or bay in which freshwater from rivers mixes with salty ocean water is called a(n)

A coastal inlet or bay in which freshwater  from rivers mixes with salty ocean water is called AN ESTUARY. An estuary is a partially enclosed coastal body of brackish water with one or more rivers flowing into it and with a free connection to the open sea.

Ithink its convection.hope this plz give brainliest!

Either b or c . i did this before