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