The brown tree snake is an invasive species in the island of Guam. The brown tree snake feeds mainly on birds and other animals' eggs (birds are reptiles). The rapid increase of brown tree snakes has caused the extinction of several bird species. These birds mainly fed on insects. The brown tree snake does not have a natural predator.
Which of the following is an impact that the brown tree snake has on the ecosystem in Guam?
-The fungi population will increase slightly
-The population of other reptiles will increase slightly
-The small plant population will increase drastically
-The insect population will increase drastically