The correct answer is A) Lake.
Option "B: Tidal pools", are small water formations that appear when the ocean recedes during the time of low tide. Since it is ocean water, it has a high level of salinity.
Option "C: Beach", is a landform that is located next to the ocean. It is formed by loose particles of gravel, sand, and pebbles. Its proximity makes it contain levels of salt.
Option "D: Coral Reef", is an ecosystem located under the ocean. Therefore, it contains the same high salt levels as ocean water.