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