Based on the section headings, which answer option is most likely the best summary of the text? A. Humans are the most important living things, followed by animals, plants, and then microorganisms. B. Without animals or plants, humans would have to rely on microorganisms in order to survive. C. Both plants and animals play a crucial role in the survival of humans by contributing things humans need, including food and energy. D. Humans receive important benefits from different living things, including animals, plants, and microorganisms