In a food chain, which type of organism feeds on secondary consumers?

In a food chain, tertiary consumers are organisms that feed on secondary consumers. This represents the next level in the trophic structure after secondary consumers, which primarily feed on primary consumers. Tertiary consumers typically occupy a higher position in the food web, often being predators that have few or no natural enemies. They play a crucial role in maintaining the balance of ecosystems by controlling the population of secondary consumers and, consequently, primary consumers. This allows for a stable energy flow and nutrient cycling within the environment.

The other options do not fit this specific role: primary consumers feed directly on producers (plants) and do not consume secondary consumers; producers convert sunlight into energy and are at the base of the food chain; decomposers break down dead organic matter and recycle nutrients but do not consume living organisms in the way tertiary consumers do.