Question

What causes the increased salinity of lagoon water?

The shallow depths increases the rate of evaporation
The water passes through the barrier picking up large amounts of salt
The lagoon water picks up extra salt deposited in the beach sand
No access to freshwater deposits to balance out the salinity

Answer 1

The shallow depths increases the rate of evaporation. Hope this helps

Answer 2

The shallow depths increases the rate of evaporation