The conversation between human and AI assistant.
[|Human|] What characteristics of the blue oak enable it to survive long periods of drought?
[|AI|] The blue oak is a deciduous oak native to California. It tolerates drought better than other oaks due its smaller canopy. This oak invests more in developing its root system rather than leaves. This enables it to tolerate long periods of drought.
[|Human|] 
What characteristics of the blue oak enable it to survive long periods of drought?