Final answer:
Karst landscape is the terrain created by an underground solution of limestone, resulting in sinkholes and caverns.
Step-by-step explanation:
The terrain created by an underground solution of limestone creating sinkholes and caverns is known as Karst landscape. Karst landscapes are formed when limestone, a soluble rock, is eroded by water over time. The erosion creates unique landforms such as sinkholes, caverns, and limestone pinnacles.