Question

which biome requires organisms to be adapted to changes in salinity of the water? ocean marine estuary freshwater

Explanation:

Estuaries are areas where freshwater (from rivers) meets and mixes with saltwater (from the ocean). This mixing leads to fluctuating salinity levels. Organisms in estuaries must adapt to these changes. Oceans and marine biomes have relatively stable high - salinity water. Freshwater biomes have low and relatively stable salinity.

Answer:

Estuary