Which of the following characteristics best distinguishes an estuary from a lake?
Light penetrations, Overall depth, Salinity variations, Temperature variations , Water clarity
The appropriate answer is ' salinity variations'. Due to it location at the mouth of a river, estuaries and lakes can have variations in salinity. A lake is an inland body of water surrounded by land. An estuary is a partially enclosed body of water found where a river empties into the sea. The water in estuaries have a higher salinity and is termed brackish.
