AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(C) Bad land / ravines
Running water cuts through clayey soils forming deep channels called gullies, making the land unfit for cultivation — known as bad land (called ravines in the Chambal basin).
The textbook (Soil Erosion section, Chapter 1) explicitly states: "The running water cuts through the clayey soils and makes deep channels as gullies. The land becomes unfit for cultivation and is known as bad land. In the Chambal basin such lands are called ravines." Sheet erosion is when water flows in sheets washing away topsoil; wind erosion is caused by wind — both are different processes. Terrace land refers to terraced farming on slopes.