Timber vegetation is generally not found in which of the following

Timber vegetation is generally not found in which of the following regions?

Subtropical region
Temperate region
Alpine region
Tundra region
This question was previously asked in
UPSC CDS-2 – 2020
Timber vegetation is generally not found in the Tundra region.
Tundra regions are characterized by extremely low temperatures, short growing seasons, and permafrost (permanently frozen ground). These conditions prevent the growth of large trees suitable for timber. The vegetation typically consists of mosses, lichens, grasses, sedges, and dwarf shrubs.
Alpine regions, which are high-altitude areas above the tree line, also generally lack timber vegetation for similar reasons (cold, wind, thin soil). Subtropical and Temperate regions, however, are well-known for their extensive forests containing various types of trees that are sources of timber, such as evergreen, deciduous, and coniferous forests.