Concept:Caverns, dry valleys, and underground drainage are typical landforms of karst topography, which forms in soluble rocks.
Explanation:Karst landscapes develop most often in limestone regions.
Rainwater absorbs carbon dioxide from the air and soil, forming weak carbonic acid.
This acid slowly dissolves calcium carbonate (
CaCO3) in the limestone.
Continued dissolution enlarges joints and bedding planes into caverns and underground drainage systems.
Surface streams often disappear into these openings, leaving dry valleys on the surface.
Such features are not commonly associated with coastal, desert, or mountainous areas.
Answer:C. Limestone