Here's why:
* Climate is the key: Biomes are defined by their overall climate, including temperature, rainfall, and seasonal variations. This climate determines the types of plants and animals that can survive and thrive in a particular region.
* Similar conditions, similar life: Biomes around the world can have very different locations, but they share similar climates and therefore, similar types of organisms. For example, a tropical rainforest in Brazil will share many characteristics with a tropical rainforest in Indonesia.
* Adaptation is crucial: The plants and animals in a biome have adapted to the specific conditions of that climate. These adaptations allow them to survive, reproduce, and interact with each other in a complex web of life.
So, the answer to your question is climate.