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