The correct answer is Karst topography. Explanation & Key Takeaways: • Stalactite and stalagmite formations are typically found in karst topography, which is characterized by soluble rock such as limestone. • These formations are created by the deposition of minerals from water dripping through cave ceilings and floors. • Stalactites hang from the ceilings of caves and are formed by the dripping of mineral-rich water. • Stalagmites rise from the floor of caves and are formed by the accumulation of minerals from dripping water. • Over time, these formations can grow towards each other and sometimes even merge to form a column. Related Concepts: • Karst topography is not only characterized by stalactites and stalagmites but also includes features such as sinkholes, disappearing streams, and underground rivers. • It is primarily formed in regions where the bedrock is composed of soluble materials like limestone, dolomite, and gypsum. • The process of dissolution and precipitation of minerals plays a crucial role in shaping the unique landscape of karst regions. • Famous examples of karst topography can be found in places like the Carlsbad Caverns in New Mexico, USA, and the Guilin region in China.