Question

1. the cpt is an animal sanctuary in pittsboro, north carolina. founded in 1981, its original mission was to breed keystone species to be returned to the wild. a keystone species is an animal that serves a key function in its ecosystem. if the animal disappeared, the entire ecosystem would be negatively affected. keystone species are ______.

a scientific
b critical
c independent
d appropriate

Explanation:

The text explains that a keystone species has a key function in its ecosystem, and its disappearance would negatively affect the ecosystem. "Critical" means of great importance or essential, which matches the description of keystone species. "Scientific" relates to science, "independent" means self - reliant, and "appropriate" means suitable, none of which fit as well as "critical".

Answer:

B. critical