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