How is a plateau characterized?

A plateau is characterized as a flat landscape that is elevated above the surrounding area, often formed through tectonic uplift. This means that geological processes, such as the movement of tectonic plates, have pushed land upwards, resulting in a flat-topped area that usually features steep sides or drops. The definition emphasizes both the flatness of the surface and its significant elevation compared to the adjacent land, making option A the most fitting description of a plateau.

Other characteristics, such as a low-lying area, high steep declines, or frequent flooding, do not align with the definition of a plateau. For example, a low-lying area surrounded by hills refers to a valley rather than an elevated flatland. Similarly, a high steep decline from a high elevation relates more to mountainous terrains, while frequent flooding is associated with low-lying and flat regions like plains or river floodplains. Thus, the unique features described in option A are what distinctly define a plateau.