AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
The north-eastern states have difficult terrain marked by big rivers, dissected relief, dense forests, frequent floods, and international frontiers. These physical barriers make construction and maintenance of roads and railway lines extremely difficult, expensive, and often impossible. Air transport easily overcomes such challenging terrain and natural obstacles. Additionally, Pawanhans Helicopters Ltd. provides helicopter services to inaccessible areas in the north-east, making air travel the most practical and preferred mode of transport in the region.
Source: Airways, Chapter 7
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The examiner expects three clear reasons drawn from the textbook passage on Airways. Focus on: (1) difficult physical features — rivers, dissected relief, dense forests, floods, (2) international frontiers limiting road/rail expansion, and (3) role of air/helicopter services (Pawanhans). Avoid general statements about air travel being fast; keep the answer region-specific to north-east India.