Answer:
In mountainous areas, the decrease in temperature
with increasing altitude leads to the corresponding change in natural
vegetation,
(i) The foothills of the Himalayas?
Shiwaliks have tropical moist deciduous flora. Sal and bamboo are important,
trees up to 1,000 m in height,
(ii) They are followed by the wet hill forests. They lie between about
1,000 to 2,000 mts. Important trees' are oak, chestnut, ash, birch, etc.
(iii) Between 1,500 and 3,300 ,m above sea level, there,
occur the well- known coniferous forests. Pine, deodar, silver fir, spruce,
etc., are some dominant trees.
(iv) Above the coniferous forests lie the alpine forests
at an altitude of about 3,600m. Important trees are silver fir, pine, birch,
etc.
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