Final answer:
Two factors used to characterize a biome are climate and the species that live there.
Step-by-step explanation:
Two factors used to characterize a biome, such as the desert, tropical rainforest, or temperate grasslands, are climate and the species that live there.
Climate plays a major role in determining the characteristics of a biome. For example, deserts are characterized by low precipitation and high temperatures, while tropical rainforests have high precipitation and temperatures.
The species that live in the biome also define its characteristics. Each biome has a unique combination of plants and animals that are adapted to the specific environmental conditions of that biome.
Learn more about Characteristics of biomes