The correct answer is: A. Himalayan moist temperate forests.
Himalayan moist temperate forests are the most extensive forest type in Himachal Pradesh, covering about 50% of the state’s area. These forests are found at an altitude of 1,500 to 3,000 meters and are characterized by a cool, moist climate. The dominant tree species in these forests are oak, maple, and rhododendron.
Sub-alpine and alpine forests are found at an altitude of 3,000 to 4,500 meters. These forests are characterized by a cold, dry climate and are dominated by coniferous trees such as fir, spruce, and larch.
Tropical thorny forests are found in the southern part of Himachal Pradesh, at an altitude of 500 to 1,500 meters. These forests are characterized by a hot, dry climate and are dominated by thorny trees such as acacia and babul.
Sub-tropical pine forests are found in the northern part of Himachal Pradesh, at an altitude of 1,000 to 2,500 meters. These forests are characterized by a cool, dry climate and are dominated by pine trees such as chir pine and deodar.