Câu 20: GED Section 3 Science: Section Three Science

An island in the Adriatic Sea was overpopulated with snakes. Sailors who came to the island brought and let loose mongooses, animals that feed on snakes. The population of snakes started decreasing, since the mongooses were eating them. The mongoose population started increasing since there was ample food around. The mongooses were not native to the island and there was no predator on the island to keep the mongoose population in check. At some point, there were hardly any snakes left on the island, and people started populating it. The mongoose, facing a shortage of snakes, started eating chickens that people kept for their eggs and meat. However, people caught on and protected the chickens from getting eaten. The mongoose population decreased. Some remain on the island, but their number is now at equilibrium, kept in check by the availability of food. There were hardly any snakes left on the island because

1. A. mongooses had eaten them. — đáp án hiện tại
2. B. people had killed them.
3. C. there was no predator for the mongooses.
4. D. sailors brought them prey.
5. E. the chickens didn’t taste as good to the mongooses.