Tropical, subtropical, temperate, and alpine vegetation can all be found in the Himalayas, and each variety predominates in a region primarily influenced by elevation and precipitation. The species found in each zone vary significantly due to local variations in relief, climate, and exposure to wind and sunlight.
The humid Himalayan foothills in the east and center are the only places where tropical evergreen rainforest can be found. The evergreen dipterocarps, a group of common trees that produce resin and timber, thrive on a variety of soil types and steepnesses in hill slopes. Oaks (genus Quercus) and Indian horse chestnuts (Aesculus indica) grow on the lithosol (shallow soil made up of imperfectly weathered rock fragments), which covers sandstones from Arunachal Pradesh westward to central Nepal at elevations of 3,600 to 5,700 feet. Mesua ferrea, a species of Ceylon ironwood, grows on porous soils between 600 and 2,400 feet (180 and 720 metres) (1,100 to 1,700 metres). On the steeper slopes, alder trees (genus Alnus) can be found growing alongside watercourses. Higher elevations cause certain species to succumb to mountain woods, where Himalayan screw pine serves as the predominant evergreen (Pandanus furcatus). Aside from those trees, it is thought that the eastern Himalayas are home to 4,000 species of blooming plants, 20 of which are palms.
Their white fur helps them blend in with the snow and ice. A polar bear has a layer of fat under its skin which helps it stay warm. It also has a thick layer of fur
Migration may lead to an improvement in income distribution because labor exodus may generate tight labor market conditions in supplying areas, resulting in increased wages of rural workers. The evidence of Pakistan tended to support this.
