Biomes are determined by

Biomes are determined by their climate which is determined by percipitation and temperature

Explanation:

There are two main factors when scientists define a biome. One is the climate or the long-time average weather of a region. The other is the specific plants and animals in an area. The organisms in a biome often adapt to their environment. There are seven types of biomes based on these factors.

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2%? i tried finding the exact sorry if it's not 100% correct ; -;