Answer:
B) consumers
Step-by-step explanation:
Animals can be carnivores or not (they can also be herbivores or omnivores), so option A is not correct.
In any food web, animals function as a consumers. They can be primary consumers, secondary consumers, tertiary consumers, and so on; depending on which place of the chain they are.
Animals can be decomposers or not, so option C is not correct. Animals like worms, slugs and snails are decomposers. Other decomposers include bacteria and mushrooms.
In any food web, the producers are plants, not animals; so option D is incorrect.