Watch the video found at this link: https://www.youtube.com/watch?v=ysa5OBhXz-Q Thoughtfully answer the following questions. You should not need to “google” the answers or use other references. Please use complete sentences, correct grammar and spelling. You do NOT need to answer these questions in “essay” format. 1. What is a trophic cascade?2. When were wolves reintroduced into Yellowstone? How long had they been absent?3. What effect did the wolves have on the deer ASIDE FROM DIRECT PREDATION? 4. Did the wolf/deer relationship affect other organisms? How?5. How did all of this affect the PHYSICAL GEOGRAPHY of the park?