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