How did the reintroduction of wolves affect elk behavior in Yellowstone?
- Elk began to graze more in open river valleys.
- Elk started avoiding areas where they could be easily trapped.Correct
- Elk populations decreased significantly.
- Elk migrated out of Yellowstone National Park.
Why: The source states that after wolves were reintroduced, elk began avoiding places where they could easily be trapped, such as narrow valleys and stream banks, which altered their grazing patterns.