A( would be found at the mouth of a river where fresh and salt water meet.

Salutations!

A(n) would be found at the mouth of a river where fresh and salt water meet.

A(n) estuary would be found at the mouth of a river where fresh and salt water meet. The result of fresh water mixing with the salt water is called barckish water. Estuary is where the river meets sea, and sea is where you find salty water.

Hope I helped :D

Exploration mission 2;