The groups that contain both primary and secondary consumers are C and D. Thus, the correct option is C.
What is the Primary consumer?
The primary consumer may be defined as a type of organism that directly feeds on primary producers. Such types of consumers are also known as herbivores.
Primary consumers generally eat plants, which are classified as producers. Producers are essentially categorized at the initiation of the food chain.
Secondary consumers typically eat primary consumers. This means that organisms that are significantly dependent on both primary and secondary consumers are omnivores.
The major difference between the list of Organisms C and D is that Organisms of list C eat insects, which are classified as primary consumers, whereas Organism of list D eats fish, which are classified as secondary consumers.
Therefore, the groups that contain both primary and secondary consumers are C and D. Thus, the correct option is C.
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