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