When wolves were reintroduced to Yellowstone in 1995, it had an impact on the deer population, which in this case were elk. The correct answer to the question "What happened to the deer (elk) when the wolves were brought back to Yellowstone in 1995?" is:
- The wolves made the deer decrease in population.
By preying on the deer (elk), the wolves helped control their population. This resulted in a decrease in the number of deer (elk) in Yellowstone. As a result, the vegetation that the deer (elk) typically grazed on was able to recover and grow more abundantly. This demonstrates the important role that predators like wolves play in maintaining the balance of ecosystems by regulating the populations of prey species.
