The Getting Better Blog : Yellowstone and Wolf Trackers 2

Have you read the entry "Wolves to the Rescue" on the Getting  Better Blog? Let us see how much you remember.  Answer the following questions:  

1.  How long has  Francis been working as a volunteer wolf tracker in Yellowstone National Park?
2.  Does he work alone ?
3. What is the aim of the project he is involved in?
4. Why did the wolves disappear from Yellowstone?
5. What happened when elk started looking for food near river banks?
6. What did the organizers of Yellowstone National Park decide to do then?
7. What happened to the elk?
8. What happened when new trees started to grow by the river banks?
9. What is one of the most popular tourist attrations in Yellowstone?