Final answer:
Karst terrains consist of materials that are insoluble in water. This statement is false.
Step-by-step explanation:
Karst terrains consist of materials that are insoluble in water. This makes the statement false. Karst topography is actually formed by the dissolution of soluble rock, such as limestone, by water over a long period of time.
As the water dissolves the limestone, cavities and caves can form. So, the correct answer is B) False.