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