Permafrost is a type of layer that is found in which region?

Permafrost is a layer of permanently frozen soil that occurs in cold regions, particularly in the tundra biome. This biome is characterized by low temperatures, short growing seasons, and limited vegetation, making it conducive to the formation of permafrost. The presence of permafrost affects the ecosystem significantly, influencing soil structure, drainage, and the types of plants and animals that can thrive in these regions.

In contrast, temperate forests experience moderate temperatures with distinct seasons, which do not support the sustained freezing necessary for permafrost to develop. Tropical rainforests have warm, humid climates that promote soil decomposition and do not support frozen ground. Deserts typically have low moisture, extreme temperatures, and minimal organic matter, which also do not create conditions favorable for permafrost. Thus, the correct association of permafrost is distinctly with the tundras.