Here's why:

* Temperature and Precipitation: Biomes are large-scale ecosystems characterized by specific plant and animal communities. These communities are adapted to the prevailing climate conditions, primarily temperature and precipitation.

* Latitude and Altitude: These factors influence temperature and precipitation.

* Global Wind Patterns: Wind patterns contribute to regional variations in rainfall and temperature.

* Ocean Currents: Currents influence the distribution of moisture and temperature along coastlines.

While other factors like soil type, topography, and human activity can influence the local distribution of plant and animal communities within a biome, climate is the primary driver of biome distribution on a global scale.