Select all that applyWhich of the following have occurred in response to the reintroduction of wolves into Yellowstone?Multiple select question.Many bird species returned to the park.Small mammals such as rabbits and mice were eliminated.Stream erosion increased.The elk population decreased dramatically.

The reintroduction of wolves into Yellowstone has led to several ecological changes. Here are the correct responses from the options provided:

1. Many bird species returned to the park: This is true. The reintroduction of wolves changed the behavior of elk and other animals, leading to an increase in plant life that bird species depend on.

2. Small mammals such as rabbits and mice were eliminated: This is false. The reintroduction of wolves did not lead to the elimination of small mammals. In fact, the changes in the ecosystem may have provided more opportunities for these animals to thrive.

3. Stream erosion increased: This is false. The reintroduction of wolves actually helped reduce stream erosion. By controlling the population of animals like elk, plant life along streams was able to recover, which in turn reduced erosion.

4. The elk population decreased dramatically: This is true. Wolves are natural predators of elk, so their reintroduction led to a decrease in the elk population. However, this decrease was beneficial for the overall health of the ecosystem.