Answer:
The correct answer world is -it will tightly close the Shell until the water salinity gets normal.
Step-by-step explanation:
Oysters are the marine organisms that have a shell on their body which helps this organism to adapt to the environment changes. This shell also protects oysters from predators.
These organisms also are known for their filter property as they filter almost 50 gallons of water on a daily basis by closing their shell tightly that prevents salt to pass through them and the only freshwater comes out.
Thus, the correct answer is - it will tightly close the Shell until the water salinity gets normal.