Final answer:
A third-level consumer is a carnivore that consumes other animals to obtain energy.
Step-by-step explanation:
A third-level consumer is an organism that consumes secondary consumers. In a food chain, the flow of energy typically goes from producers to primary consumers (herbivores) to secondary consumers (carnivores or omnivores). Therefore, a third-level consumer has to be a carnivore. They obtain energy by consuming other animals. For example, a lion that eats a zebra would be considered a third-level consumer.
Learn more about Food Chains