Principle: People should not feed wild animals because it makes them dependent on humans and less likely to survive on their own. Situation: Bird lovers commonly feed wild birds to attract them to their yards and gardens. Which one of the following, if assumed, would most help to justify treating the human feeding of wild birds as an exception to the principle above? ['Some species of wild birds benefit humans by consuming large numbers of mosquitoes and other insect pests.', 'Human settlement is so pervasive in the habitat of most wild birds that they must depend in part on human sources of food for survival.', 'Wild birds are much more likely to congregate in yards where they are fed than in yards where they are not fed.', 'Congregating around human bird feeders makes wild birds more vulnerable to predators and diseases.']