Final answer:
Abiotic factors, such as rainfall and temperature, determine the characteristics of biomes by influencing other abiotic factors and influencing the types of plants that can survive in a particular biome.
Step-by-step explanation:
The abiotic factors, such as the amount of rainfall and the temperature, are going to influence other abiotic factors, such as the quality of the soil. This, in turn, is going to influence the plants that migrate into the ecosystem and thrive in that biome. It is the interaction of the abiotic and biotic factors that describe a biome and ecosystem.