Explore and analyze one keystone species, the gray wolf, and its influence on the ecosystem in and around Yellowstone National Park in the United States. Then, based on your analysis, you recommend a policy to benefit this particular ecosystem.
Briefly summarize the recommendation
Explain how the recommendation benefits the ecosystem of the region
Identify one possible barrier your recommendation may encounter and a suggestion on how to address the barrier
At least two sources not included in the Required Resources
References cited in APA format.