Oak, pine, deodar, birch and rhododendron are the important trees of which of the following regions?

[A] Cold desert
[B] Hot desert
[C] Grasslands
[D] Tropical forests

The extremely low precipitation of subtropical desert biomes might lead one to expect fire to be a major disturbance factor; however, fire is more common in the temperate grassland biome than in the subtropical desert biome. Why is this?

Explain your answers, please.

Fire is a common occurrence in prairie grasslands. What do you think would happen to a grassland area if fire were excluded for many decades?