Question

1. which detail can be included in a summary of \how keystone species create balance\ section of \the key to a healthy habit\? a yellowstone was made into a national park before wolves were removed. b wolves prey on elk, and elk eat gra s at yellowstone. c bison, birds, and small mammals are all part of the yellowstone ecosystem. d yellowstone is an ecosystem that experienced damage and was restored.

Explanation:

A summary should capture the core ecological relationships. Option B shows the predator - prey - plant relationship which is central to how keystone species (wolves in this case) create balance. Option A is about a historical event (Yellowstone becoming a park) not directly related to the balance - creating mechanism. Option C just lists species without showing the relationship. Option D is too general about damage and restoration without focusing on the keystone species' role in balance.

Answer:

B. Wolves prey on elk, and elk eat grasses at Yellowstone.