Quarantine controls, coupled with the scarcity of many types of parrots in the wild in Africa, Australia, Indonesia, and South America, have caused a shortage of birds which can be sold legal

Quarantine controls, coupled with the scarcity of many types of parrots in the wild in Africa, Australia, Indonesia, and South America, have caused a shortage of birds which can be sold legally under (4) _____ This has sent prices to (5) _____ levels.

4. _______