You're a scientist, observing rodents on the Gallo Pegasus Island you noticed that the introduction of new bird of prey has limited the number of rodents. What term best describes the factor that is limiting the number of rodents the environment can support with your answer food supply fitness, selected pressure or variation.

The term that best describes the factor limiting the number of rodents in this scenario is "predation pressure." Predation pressure refers to the influence exerted by predators on a population, in this case, the new bird of prey limiting the number of rodents.