What is the primary vegetation type found in tundra regions?

The primary vegetation type found in tundra regions is sparsely vegetated areas. Tundra is characterized by its extreme cold, short growing seasons, and permafrost, which restricts plant growth. The vegetation in tundra mainly consists of low-growing plants such as mosses, lichens, sedges, and small shrubs. These plants are adapted to survive the harsh climate, with many being perennial and capable of storing nutrients to endure the long winters.

In contrast, the other types of vegetation listed are not representative of tundra environments. Deciduous forests thrive in temperate regions with sufficient rainfall and a more moderate climate, while grasslands are typically found in areas with sufficient moisture but not enough for forest growth. Dense forests require a different climate altogether to support the variety of tree species needed for that type of vegetation.

Thus, the classification of tundra as sparsely vegetated accurately reflects the limitations posed by its environment.