To understand the relationship between number of predators and numbers of available prey.
Forest and scubland
Gray Wolves!
Heavy Winter snow
Hot suplhurous springs
Geysers
Write you ideas in your books
Why did the Gray Wolf go extinct from Yellowstone?
Why do you think that the Gray Wolf was reintroduced to Yellowstone in 1995?
What impact do you think it would have on the food web of Yellowstone?