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Prior to 1940, the island of Guam had never hosted any species of snakes. With the construction of a United States air force base on the island in 1940, the brown tree snake was accidentally introduced to the island.

Classified as an invasive species in Guam, which of the following BEST predicts what the snakes have caused?


The extinction of many other introduced pest species on the island.


The emergence of several new snake species as a result of adaptive radiation.


The drastic decline of the populations of most of the island's native bird species.


A massive biological control project in which conservation biologists successfully eliminated the snakes from the island.

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