Answer: d. It is characterized by coniferous trees.
The alpine biome are the biomes that are typically found in the high altitude. It is characterized by the typically lower temperatures, experiences long winter season, it receives rainfall of 30cm annually. Taiga is the coldest biome of the earth. It also exhibit lower precipitation like alpine. The main difference between taiga and alpine biome is that taiga typically exhibit heavy snow fall and growth of the coniferous trees such as pines, larches and spruce.