What term is a synonym for an autotroph, an organism that makes energy using sunlight?

• A. Biomass
• B. Producer
• C. Sediment
• D. Energy

Answer: (B)

The main idea here is identifying the term that describes an organism capable of converting sunlight into usable energy. Such organisms are autotrophs, and in ecological language they are called producers because they generate the organic matter that powers the rest of the ecosystem. This naming highlights their role at the base of the energy flow, as they synthesize biomass from inorganic inputs using light energy, providing food for consumers and decomposers alike. Biomass refers to the total amount of organic material, not the organism type. Sediment is just material at the bottom or on the ground, and energy is a property, not an organism. So the best fit is producer.