Autotrophs are organisms that can produce their own food using inorganic materials and energy from sunlight or chemicals. They are the primary producers in an ecosystem and are essential for the survival of other organisms.
Consumers are organisms that cannot produce their own food and must consume other organisms or organic matter to survive. They are divided into three groups: herbivores, carnivores, and omnivores.
Herbivores are consumers that eat plants. Carnivores are consumers that eat other animals. Omnivores are consumers that eat both plants and animals.
Saprophytes are consumers that decompose dead organisms and organic matter. They are important in the process of decomposition, which returns nutrients to the soil.
The correct answer is D. Producers.