The correct answer is: A. Semi-desert Plains.
Semi-desert plains are the regions with the lowest elevation in Haryana. They are located in the northwestern part of the state and are characterized by their low rainfall and sparse vegetation. The semi-desert plains are home to a variety of wildlife, including camels, snakes, and lizards.
Marshy land is a type of wetland that is characterized by its high water content. Marshy land is often found in low-lying areas, such as river valleys and floodplains. Marshy land is an important habitat for a variety of plants and animals, including waterfowl, amphibians, and reptiles.
Alluvial plains are a type of plain that is formed by the deposition of sediment from rivers. Alluvial plains are often found in floodplains and deltas. Alluvial plains are some of the most fertile land on Earth and are used for agriculture.
Piedmont plains are a type of plain that is formed at the foot of mountains. Piedmont plains are often found in areas where mountains meet the plains. Piedmont plains are typically characterized by their rolling hills and gentle slopes.