How are omnivores, carnivores, and herbivores similar?

A) They are all producers.
B) They are all consumers and produce oxygen.
C) They all produce their own food.
D) They all produce oxygen.
E) They are all consumers and produce carbon dioxide.

Omnivores, carnivores, and herbivores are all consumers and release carbon dioxide as a byproduct of cellular respiration. None of them produce their own food, and they do not produce oxygen as a primary function. Additionally, only herbivores can be considered producers if they are photosynthetic organisms.