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