Final answer:
Salt wedging is unimportant in humid regions because the consistent moisture prevents the salt crystal growth that breaks apart rocks, which is true.
Step-by-step explanation:
The statement that salt wedging is a weathering process which is unimportant in humid regions is A. True. Salt wedging primarily occurs in arid and semi-arid regions where water can evaporate quickly, leaving behind salt crystals. These crystals grow and exert pressure on rocks, causing them to fracture and break apart. However, in humid regions, consistent moisture generally prevents the buildup and evaporation cycles necessary for salt wedging to be a significant form of weathering.