Final answer:
Precipitation levels and temperature are the two main factors that determine an area's biome.
Step-by-step explanation:
The two main factors that determine an area's biome are precipitation levels and temperature. These abiotic factors play a crucial role in shaping the characteristics and distribution of different biomes. For example, a tropical rainforest biome typically has high levels of precipitation and a warm temperature, while a desert biome has low levels of precipitation and a hot temperature.