Here's why:

* Cold: Tundra experiences extremely low temperatures, with average annual temperatures below freezing. Winter can be incredibly harsh, with temperatures dropping well below -30°C (-22°F).

* Dry: Tundra receives very little precipitation, making it a very dry biome. This is because the air is so cold that it can't hold much moisture.

Let me know if you'd like to know more about the tundra!