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