Thomas Malthus argued that if the human population grew unchecked, then supplies of food and other resources would be exhausted. Which of these ideas about evolution did Darwin adapt from Malthus’s work? A. An organism passes many of its traits to its offspring. B. All organisms fill a niche, or role in their environment. C. Variations within a species are necessary for evolutionary change. D. Organisms are able to produce many more offspring than will survive.