Answer:
(i)
Airways can cover very difficult terrains like high mountains, dreary deserts,
dense forests and long oceanic stretches with great ease.
(ii) North-eastern part of the country is marked with the presence of big
rivers, dissected reliefs, dense forests and frequent showers and floods and
international frontiers, etc.
(iii) Air travel has made access easier to these
undulating north-eastern states of India.
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