... bird species are threatened with _____.a. appearance b. protection c. extinction d.destruction 10. We really ought to make a start on campaigns to _____ our polluted riversand seas.a. clean ... parts of Idaho andMontana. It has many wild animals, (40) _____ bears, buffalo, elk, deer,antelope, coyotes, and lynxes, and is famous (41) _____ its fine scenery, hotsprings and (42) _____...