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