The natural vegetation of monsoon region varies with the amount of rainfall, soil and slope like tropical rainforests, monsoon deciduous forest and scrub vegetation. In the areas where there is sufficient rainfall and heat, we can find tropical rainforests. Then, the plants shed their leaves in the winter. Similarly, the areas with sandy and gravely soil and little rainfall do have scrub vegetation. Nepal also lies in the monsoon region but there is vast difference between the vegetation in the mountains and Terai. For this, altitude plays a great role. In the Terai high temperature and ample rainfall permit the rapid growth of the forest. The trees are tall with straight trunks and branches in the upper part. These are broad leaved umbrella shaped evergreen trees. Unlike this, the vegetation like the temperate coniferous forest; the alpine grasslands and the tundra vegetation which can bear the cold are found in the mountain region of Nepal depending upon the height. We experience this difference due to difference in height.
Tropical Monsoon is one of the climatic features found around the world. This kind of climate is found in 5°to 30°south and north of Equator. The most common feature is that the places in this climatic belt receive rainfall/monsoon during the summer. So, in the summer it has hot and wet where as in winter cold and dry type of climate. This is because the wind blows from sea to land in summer and from land to sea in winter. In the context of Nepal, the rainfall amount in Terai to Himalayan and eastern to western vary because of distance from the sea and altitude of the places. The life style of the people of this area is different because of the climatic style of rainfall. Rainfall in summer supports good vegetation, so many people are framers. Paddy is an import-food crops whereas jute, cotton, sugarcane, tea, rubber, coffee fruits are important cash, crops. Here, flows some large rivers which has supported the agriculture. Industries and trade has been flourishing here. The eastern cultures of Hwang-Ho, Indus valley are historical but they are almost declined by more interest over western culture.
Yes, there is high population density in the monsoon region. This region experiences enough rainfall and high temperature as well. The soil of this region is also fertile. Various kinds of food crops and cash crops can be grown here. The people use agricultural land and settle nearby to make their work easy. Agriculture needs more hands, so people produce many children. India, Bangladesh, Bhutan, China and Nepal are examples of it. These countries economy is mostly based in agriculture. Population growth rate is also high. No countries have made substantial effort to control population. These are the main causes of high population here.