The Aravallis act as a natural barrier between the Thar Desert and the eastern fertile lands. Their elevation and forest cover reduce wind speed, preventing sand and desert conditions from spreading eastward into agricultural regions, thus protecting the ecosystem and human settlements.
Class 7 Social Science Chapter 1 Geographical Diversity of India question answer
Class 7 NCERT Social Science India and the World: Land and the People Chapter 1 Geographical Diversity of India
The Aravalli Hills run diagonally across northwest India and play a crucial environmental role by stopping the desertification of eastern areas. Their presence interrupts hot desert winds, reducing wind speed and sand movement toward fertile eastern lands. The forest cover and terrain act as a shield, preventing the expansion of the Thar Desert into the plains of Rajasthan and Haryana. Without this natural barrier, desert conditions could threaten farmlands, biodiversity and water resources in the region.
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