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