Which characteristic would a marine organism that lives in the intertidal zone on a barrier beach possess? 

A)  intolerant to changes in salinity 
B)  tolerance to changes in acidity 
C)  intolerant to changes in temperature 
D)  tolerance to being exposed to air

Intertidal Zone

A coastal area that lies between the high tide and low tide lines, periodically submerged and exposed by the tide.

Barrier Beach

A coastal landform comprised of sand or other sediment, lying parallel to the shore, that protects the inland area from waves and tidal impacts.

Acidity

A measure of the concentration of hydrogen ions in a solution, reflecting how acidic or basic the solution is.