The savanna gets a fair amount of rain, at least 20 inches a year.
Australia
North America
Antarctica
Asia
Midlatitudes
Rain shadows
Different temperatures
Bajadas
Grassland
Temperate forest
Tundra
Desert
All of the above
Developing fire-resistant cover
Growing quickly
Having deep roots
They have thorns
They have toxic chemicals
Ants protect them
A combination of the above defenses
They all migrate in different directions
They eat different foods
They avoid each other as much as possible
Their territories don't overlap
Spring and summer
Winter and summer
Winter and fall
Dry and wet