Australia
North America
Asia
Antarctica
Tundra
Temperate forest
Grassland
Desert
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
They have thorns
Ants protect them
A combination of the above defenses
They have toxic chemicals
Their territories don't overlap
They avoid each other as much as possible
They all migrate in different directions
They eat different foods
Winter and fall
Dry and wet
Winter and summer
Spring and summer