What are highlands that rise abruptly and are flat on top?

Highlands that rise abruptly and are flat on top are known as plateaus. These landforms are characterized by their elevated flat terrain, often surrounded by steep cliffs or slopes. Plateaus can form through various geological processes, including volcanic activity, erosion, or the uplift of land due to tectonic forces. Examples include the Colorado Plateau in the United States and the Deccan Plateau in India.