sentence2_structure: A fewer predators<>is<>most likely to cause the number of rabbits$$$A fewer predators<>to cause<>the number of rabbits$$$rabbits<>living<>in an area<>to increase$$$the number of rabbits<>to increase<>
sentence1: They usually live alone in swamps, and are generally the most dangerous predator in the area they inhabit.
sentence2: A fewer predators is most likely to cause the number of rabbits living in an area to increase.
question: Which factor is most likely to cause the number of rabbits living in an area to increase?