The type of the natural bioms which lack tree is ______

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the type of natural biome that lacks trees. This indicates that we are looking for a specific environment where tree growth is not possible.

2. **Identifying the Biome**: One of the well-known biomes that is characterized by the absence of trees is the "Alpine Tundra." This biome is typically found at high elevations where the climate conditions are not suitable for tree growth.

3. **Characteristics of Alpine Tundra**: The Alpine Tundra is characterized by its cold temperatures, strong winds, and short growing seasons. Due to these harsh conditions, trees cannot survive, and instead, the vegetation consists of dwarf shrubs, grasses, and mosses.

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