Which term best describes an organism that can make its own food using energy from the sun or chemicals?

• A. Primary Producer
• B. Secondary Consumer
• C. Omnivore
• D. Autotroph

Answer: (D)

Autotrophs are organisms that produce their own organic matter from inorganic inputs, using energy either from sunlight or from chemical reactions. By capturing light energy (photosynthesis) or chemical energy (chemosynthesis), they convert that energy into sugars and other organic molecules that fuel themselves and form the base of the ecosystem’s food supply. Examples include plants, algae, and some bacteria.

The term that best describes an organism with this ability is autotroph. It captures the idea of making food from basic inputs, rather than obtaining it by consuming other organisms. While such organisms often serve as primary producers in a food web, the essential trait here is the capacity to synthesize food, which is what autotroph means.

Secondary consumers are organisms that eat other organisms, not producers. Omnivores eat both plants and animals but do not inherently indicate the ability to make their own food.