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