Question

hypothesis
explain why reintroducing wolves changed the ecosystem of the park?
because reintroducing wolves triggered a trophic cascade.

Explanation:

A trophic cascade occurs when a top - predator (like wolves) is reintroduced. Wolves, as predators, control the population of their prey (such as deer). With fewer deer, the vegetation that deer feed on (like certain plants, trees) can recover and grow. This change in plant life then affects other organisms that depend on those plants, such as insects, small mammals, and birds. Also, the change in prey population and vegetation can impact the physical structure of the ecosystem, like the growth of forests or the health of riverbanks (since deer overgrazing can harm river ecosystems). So, the reintroduction of wolves starts a chain reaction through the different trophic (feeding) levels of the ecosystem, thus changing the entire park's ecosystem.

Answer:

Reintroducing wolves changed the park's ecosystem because it triggered a trophic cascade. Wolves (top predators) reduced prey (e.g., deer) populations. This allowed vegetation (e.g., trees, plants) to recover, which impacted organisms dependent on that vegetation and altered the ecosystem's physical structure (e.g., forest growth, river health) through a chain reaction across trophic levels.