How are plains and plateaus similar?

Plains and plateaus are both flat or gently sloping landforms, but they are formed differently. Plains are broad, flat areas of land, usually found at low elevations and formed by the deposition of sediment by rivers, glaciers, or winds. In contrast, plateaus are elevated flat lands, typically raised above the surrounding areas, and can be formed through volcanic activity or erosion. Both landforms provide fertile soil for agriculture and are important for human settlement. However, plains are more common at lower altitudes, while plateaus are found at higher elevations.

This question related to Chapter 3 Social Science Class 6th NCERT.
From the Chapter 3. Landforms and Life.
Give answer according to your understanding.