Which of the following biomes is characterized by an extremely cold climate, low-growing plants, and a layer of permanently frozen subsoil called permafrost?

Rainforests are characterized by high levels of precipitation and a warm climate, supporting a diverse range of flora and fauna. Unlike the tundra, rainforests have no permafrost and are home to tall trees, dense vegetation, and a humid atmosphere. These conditions are entirely opposite to the cold and low-growing plant life found in tundra regions.

Savannas are characterized by a warm climate with seasonal rainfall and are characterized by grasses and scattered trees. This biome supports a different type of biodiversity compared to the tundra, thriving in warmer temperatures and lacking the permafrost layer that defines tundra landscapes.

Temperate forests experience moderate climates with distinct seasons, supporting a variety of deciduous and coniferous trees. The presence of rich soil and diverse plant life in temperate forests contrasts sharply with the tundra's cold conditions and low-growing vegetation, further confirming that they are entirely different biomes.