Answer:
Climate
Step-by-step explanation:
In biology, A Biome can be describe as an environment that determine the types of organisms that can live there. One Biome usually consist of several ecosystems that scattered across the region.
Climate usually determine the temperature and humidity that exist in a certain region. This will influence the type of plants and microorganism that can live in that area. Since both of them are placed at the bottom of the food chain, those two will also affects the type of animals in the higher food Chain that can live near them. Because if this The ecosystems in a biome generally share the same climate.