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