Which of the following is NOT considered a major biome on Earth?

The correct choice, which is the urban city, is not considered a major biome on Earth. Biomes are large ecological areas on Earth’s surface that share similar climate, vegetation, and wildlife. They are typically characterized by distinct environmental conditions, such as temperature and precipitation patterns, which support specific types of ecosystems.

Tundra, temperate forest, and desert are all recognized as major biomes because they encompass large regions where particular types of flora and fauna thrive under specific climatic conditions. For instance, tundras define cold, treeless regions; temperate forests have deciduous trees and a temperate climate; and deserts are characterized by extremely low precipitation, resulting in specialized plant and animal life adapted to arid conditions.

In contrast, urban cities are human-made environments that do not fall under the classification of biomes. While cities can influence local ecosystems and may support a range of species, they do not represent a stable, natural ecological community found in nature like the other choices do. Instead, urban areas are typically characterized by anthropogenic factors, such as infrastructure and human activity, rather than natural climate and ecological patterns.