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