"They are eaten by second-level consumers" describes producers.
Option: D
Explanation:
The producers are also known as autotrophs, who produce their food with the help of photosynthesis like plants. The second trophic level is made up of organisms who eat the producers, like deer, snakes, and many different kinds of birds. The producers are placed at the bottom or known as foundation or basis of food chain. In food chain there are producers are the first trophic level, consumers are the second level (primary, secondary and tertiary) and decomposers are final third level.
