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