It is succeeded by the wet temperate type of forests between an altitude of 1,000 - 2,000 m.
Between 1,500 - 1,750 m, pine forests are also well-developed in this zone, with Chir Pine as a very useful commercial tree. Deodar, a highly valued endemic species grows mainly in the western part of the Himalayan range.
In the higher reaches there is a transition to Alpine forests and pastures. Silver firs, junipers, pines, birch and rhododendrons, etc. occur between 3,000 - 4,000 m.
At higher altitudes, mosses and lichens form part of the tundra vegetation.
Hence the correct sequence from foothills to the top is 2-1-3-4 in the given question.