What kind of wildlife might inhabit the cave?

The correct choice highlights the unique adaptations of certain wildlife that thrive in cave environments. Bats are commonly associated with caves as they often roost and rear their young inside due to the dark, sheltered conditions that help protect them from predators. Additionally, cave-dwelling insects, like cave crickets and certain species of beetles, are specially adapted to live in these dark, humid spaces, relying on the specific microhabitats within caves for food and reproduction.

While deer, raccoons, birds, and squirrels typically inhabit more open areas and would not be found deep within a cave, the unique biodiversity within caves supports species specifically adapted to the low-light conditions and the ecological niches present there. This makes bats and cave-dwelling insects the most logical inhabitants of a cave like Niagara's, illustrating the specialized nature of wildlife in such unique ecosystems.