Contrast 'heterotrophic' with the other options: 'Photosynthetic' refers to organisms that use sunlight to produce food (e.g., plants), 'autotrophic' refers to organisms that produce their own food (e.g., plants and some bacteria), and 'chemosynthetic' refers to organisms that use chemical reactions to produce food (e.g., certain bacteria). Fungi do not fit into these categories.