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