Question

which feature is not used to characterize biomes? vegetation climate radiation soil

Explanation:

Biomes are large - scale ecosystems. They are characterized by climate (temperature and precipitation patterns), vegetation (the types of plants that grow there which are adapted to the climate), and soil (which also interacts with the climate and vegetation). Radiation is not a direct and specific feature used to characterize biomes. While radiation is related to climate (as it is part of the energy input that influences temperature), it is not a standalone feature like climate, vegetation, or soil when it comes to biome characterization.

Answer:

Radiation