Which of the following is NOT considered a biome?

The term "biome" refers to a large ecological area on the Earth's surface with distinct flora, fauna, and climate. Biomes are characterized by their ecological community and climate conditions, which influence the types of plant and animal life that can thrive in those areas.

The tundra, desert, and tropical rainforest are all classified as biomes due to their specific climatic conditions, plant species, and animal adaptations. Each of these biomes demonstrates distinct environmental factors such as temperature, precipitation, and biodiversity. For example, the tundra is known for its cold temperatures and low biodiversity, while tropical rainforests are recognized for their warm climates and rich biodiversity.

In contrast, a plateau is a geographical feature defined by its flat terrain elevated significantly above the surrounding area. While plateaus can exist within various biomes and can influence local climates and ecosystems, they are not classified as a biome themselves. A plateau does not represent a unique set of ecological communities or climatic conditions but rather a landform that can occur across different biomes. This makes it the correct answer in identifying what is not a biome.