Coral Reefs Destroyed by Dynamite Fishing or Other Destructive Practices

Coral reefs destroyed by dynamite fishing or other destructive practices are sometimes restored by building metal lattices, or "spiders," and attaching them to the seafloor.Pieces of living coral are attached to the lattices and eventually reproduce and grow, gradually increasing the size of the coral skeleton and restoring the coral reef habitat.In this situation, the ecological restoration process is aided by the use of a(n)

A) keystone species.
B) primary producer.
C) ecosystem engineer.
D) captive breeding species.
E) invasive species.