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Rabbits were introduced to a small island off the coast of Fiji thirty years ago. Researchers have found that while the rabbit population increased exponentially for the first two decades, the population growth rate has steadily declined in the last ten years.

Which of the following factors are possible density-dependent regulators of these rabbits? Select ALL that apply.


Competition for adequate nesting locations.


The spread of a pathogen.


The population increase of predatory foxes on the island.


An increased prevalence of hot days each year.


Habitat destruction.

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